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Finding the Fourth Proportional to 28,062.56, 38,719.32 and 16,129.28

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Solution

The fourth proportional to 28,062.56, 38,719.32 and 16,129.28 is: 22,254.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,062.56 : 38,719.32 = 16,129.28 : x
  2. Step 2: Convert to fraction form
    28,062.56/38,719.32 = 16,129.28/x
  3. Step 3: Cross multiply
    28,062.56x = 38,719.32 × 16,129.28
  4. Step 4: Simplify right side
    28,062.56x = 624,514,753.69
  5. Step 5: Solve for x
    x = 624,514,753.69/28,062.56
  6. Step 6: Final answer
    x = 22,254.38

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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.