Home / 15,712.59-21,683.79-8,542.99

Finding the Fourth Proportional to 15,712.59, 21,683.79 and 8,542.99

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Solution

The fourth proportional to 15,712.59, 21,683.79 and 8,542.99 is: 11,789.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,712.59 : 21,683.79 = 8,542.99 : x
  2. Step 2: Convert to fraction form
    15,712.59/21,683.79 = 8,542.99/x
  3. Step 3: Cross multiply
    15,712.59x = 21,683.79 × 8,542.99
  4. Step 4: Simplify right side
    15,712.59x = 185,244,428.24
  5. Step 5: Solve for x
    x = 185,244,428.24/15,712.59
  6. Step 6: Final answer
    x = 11,789.55

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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.