Home / 8,128.13-12,192.21-1,972.13

Finding the Fourth Proportional to 8,128.13, 12,192.21 and 1,972.13

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Solution

The fourth proportional to 8,128.13, 12,192.21 and 1,972.13 is: 2,958.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,128.13 : 12,192.21 = 1,972.13 : x
  2. Step 2: Convert to fraction form
    8,128.13/12,192.21 = 1,972.13/x
  3. Step 3: Cross multiply
    8,128.13x = 12,192.21 × 1,972.13
  4. Step 4: Simplify right side
    8,128.13x = 24,044,562.15
  5. Step 5: Solve for x
    x = 24,044,562.15/8,128.13
  6. Step 6: Final answer
    x = 2,958.19

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.