Home / 8,857.44-12,220.56-5,130.72

Finding the Fourth Proportional to 8,857.44, 12,220.56 and 5,130.72

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Solution

The fourth proportional to 8,857.44, 12,220.56 and 5,130.72 is: 7,078.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,857.44 : 12,220.56 = 5,130.72 : x
  2. Step 2: Convert to fraction form
    8,857.44/12,220.56 = 5,130.72/x
  3. Step 3: Cross multiply
    8,857.44x = 12,220.56 × 5,130.72
  4. Step 4: Simplify right side
    8,857.44x = 62,700,271.60
  5. Step 5: Solve for x
    x = 62,700,271.60/8,857.44
  6. Step 6: Final answer
    x = 7,078.83

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Half scale
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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.