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Finding the Fourth Proportional to 29,105.50, 40,165.59 and 15,857.50

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Solution

The fourth proportional to 29,105.50, 40,165.59 and 15,857.50 is: 21,883.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,105.50 : 40,165.59 = 15,857.50 : x
  2. Step 2: Convert to fraction form
    29,105.50/40,165.59 = 15,857.50/x
  3. Step 3: Cross multiply
    29,105.50x = 40,165.59 × 15,857.50
  4. Step 4: Simplify right side
    29,105.50x = 636,925,843.43
  5. Step 5: Solve for x
    x = 636,925,843.43/29,105.50
  6. Step 6: Final answer
    x = 21,883.35

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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.