Home / 15,718.59-21,691.94-8,645.00

Finding the Fourth Proportional to 15,718.59, 21,691.94 and 8,645.00

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Solution

The fourth proportional to 15,718.59, 21,691.94 and 8,645.00 is: 11,930.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,718.59 : 21,691.94 = 8,645.00 : x
  2. Step 2: Convert to fraction form
    15,718.59/21,691.94 = 8,645.00/x
  3. Step 3: Cross multiply
    15,718.59x = 21,691.94 × 8,645.00
  4. Step 4: Simplify right side
    15,718.59x = 187,526,669.62
  5. Step 5: Solve for x
    x = 187,526,669.62/15,718.59
  6. Step 6: Final answer
    x = 11,930.25

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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.