Home / 8,130.45-12,126.98-7,884.35

Finding the Fourth Proportional to 8,130.45, 12,126.98 and 7,884.35

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Solution

The fourth proportional to 8,130.45, 12,126.98 and 7,884.35 is: 11,759.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,130.45 : 12,126.98 = 7,884.35 : x
  2. Step 2: Convert to fraction form
    8,130.45/12,126.98 = 7,884.35/x
  3. Step 3: Cross multiply
    8,130.45x = 12,126.98 × 7,884.35
  4. Step 4: Simplify right side
    8,130.45x = 95,613,354.76
  5. Step 5: Solve for x
    x = 95,613,354.76/8,130.45
  6. Step 6: Final answer
    x = 11,759.91

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Find fourth proportional to 4,065.23, 6,063.49 and 3,942.18
Half scale
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Double scale
Find fourth proportional to 8,131.45, 12,128.47 and 7,885.35
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.