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Finding the Fourth Proportional to 15,901.80, 21,940.03 and 9,939.53

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Solution

The fourth proportional to 15,901.80, 21,940.03 and 9,939.53 is: 13,713.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,901.80 : 21,940.03 = 9,939.53 : x
  2. Step 2: Convert to fraction form
    15,901.80/21,940.03 = 9,939.53/x
  3. Step 3: Cross multiply
    15,901.80x = 21,940.03 × 9,939.53
  4. Step 4: Simplify right side
    15,901.80x = 218,073,586.39
  5. Step 5: Solve for x
    x = 218,073,586.39/15,901.80
  6. Step 6: Final answer
    x = 13,713.77

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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.