Home / 28,200.16-38,916.24-15,625.12

Finding the Fourth Proportional to 28,200.16, 38,916.24 and 15,625.12

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Solution

The fourth proportional to 28,200.16, 38,916.24 and 15,625.12 is: 21,562.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,200.16 : 38,916.24 = 15,625.12 : x
  2. Step 2: Convert to fraction form
    28,200.16/38,916.24 = 15,625.12/x
  3. Step 3: Cross multiply
    28,200.16x = 38,916.24 × 15,625.12
  4. Step 4: Simplify right side
    28,200.16x = 608,070,919.95
  5. Step 5: Solve for x
    x = 608,070,919.95/28,200.16
  6. Step 6: Final answer
    x = 21,562.68

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Double scale
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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.