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Finding the Fourth Proportional to 15,076.13, 20,807.48 and 8,787.29

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Solution

The fourth proportional to 15,076.13, 20,807.48 and 8,787.29 is: 12,127.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,076.13 : 20,807.48 = 8,787.29 : x
  2. Step 2: Convert to fraction form
    15,076.13/20,807.48 = 8,787.29/x
  3. Step 3: Cross multiply
    15,076.13x = 20,807.48 × 8,787.29
  4. Step 4: Simplify right side
    15,076.13x = 182,841,278.86
  5. Step 5: Solve for x
    x = 182,841,278.86/15,076.13
  6. Step 6: Final answer
    x = 12,127.87

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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.