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Finding the Fourth Proportional to 15,129.40, 22,694.10 and 7,731.40

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Solution

The fourth proportional to 15,129.40, 22,694.10 and 7,731.40 is: 11,597.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,129.40 : 22,694.10 = 7,731.40 : x
  2. Step 2: Convert to fraction form
    15,129.40/22,694.10 = 7,731.40/x
  3. Step 3: Cross multiply
    15,129.40x = 22,694.10 × 7,731.40
  4. Step 4: Simplify right side
    15,129.40x = 175,457,164.74
  5. Step 5: Solve for x
    x = 175,457,164.74/15,129.40
  6. Step 6: Final answer
    x = 11,597.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.