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Finding the Fourth Proportional to 29,387.16, 40,557.78 and 16,815.96

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Solution

The fourth proportional to 29,387.16, 40,557.78 and 16,815.96 is: 23,208.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,387.16 : 40,557.78 = 16,815.96 : x
  2. Step 2: Convert to fraction form
    29,387.16/40,557.78 = 16,815.96/x
  3. Step 3: Cross multiply
    29,387.16x = 40,557.78 × 16,815.96
  4. Step 4: Simplify right side
    29,387.16x = 682,018,006.17
  5. Step 5: Solve for x
    x = 682,018,006.17/29,387.16
  6. Step 6: Final answer
    x = 23,208.03

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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.