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Finding the Fourth Proportional to 15,898.74, 21,940.35 and 9,933.87

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Solution

The fourth proportional to 15,898.74, 21,940.35 and 9,933.87 is: 13,708.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,898.74 : 21,940.35 = 9,933.87 : x
  2. Step 2: Convert to fraction form
    15,898.74/21,940.35 = 9,933.87/x
  3. Step 3: Cross multiply
    15,898.74x = 21,940.35 × 9,933.87
  4. Step 4: Simplify right side
    15,898.74x = 217,952,425.28
  5. Step 5: Solve for x
    x = 217,952,425.28/15,898.74
  6. Step 6: Final answer
    x = 13,708.79

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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.