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Finding the Fourth Proportional to 28,732.70, 43,006.70 and 15,372.36

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Solution

The fourth proportional to 28,732.70, 43,006.70 and 15,372.36 is: 23,009.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,732.70 : 43,006.70 = 15,372.36 : x
  2. Step 2: Convert to fraction form
    28,732.70/43,006.70 = 15,372.36/x
  3. Step 3: Cross multiply
    28,732.70x = 43,006.70 × 15,372.36
  4. Step 4: Simplify right side
    28,732.70x = 661,114,474.81
  5. Step 5: Solve for x
    x = 661,114,474.81/28,732.70
  6. Step 6: Final answer
    x = 23,009.13

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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.