Home / 15,687.40-21,654.78-9,398.56

Finding the Fourth Proportional to 15,687.40, 21,654.78 and 9,398.56

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Solution

The fourth proportional to 15,687.40, 21,654.78 and 9,398.56 is: 12,973.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,687.40 : 21,654.78 = 9,398.56 : x
  2. Step 2: Convert to fraction form
    15,687.40/21,654.78 = 9,398.56/x
  3. Step 3: Cross multiply
    15,687.40x = 21,654.78 × 9,398.56
  4. Step 4: Simplify right side
    15,687.40x = 203,523,749.12
  5. Step 5: Solve for x
    x = 203,523,749.12/15,687.40
  6. Step 6: Final answer
    x = 12,973.71

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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.