Home / 15,718.32-21,691.80-8,645.13

Finding the Fourth Proportional to 15,718.32, 21,691.80 and 8,645.13

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Solution

The fourth proportional to 15,718.32, 21,691.80 and 8,645.13 is: 11,930.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,718.32 : 21,691.80 = 8,645.13 : x
  2. Step 2: Convert to fraction form
    15,718.32/21,691.80 = 8,645.13/x
  3. Step 3: Cross multiply
    15,718.32x = 21,691.80 × 8,645.13
  4. Step 4: Simplify right side
    15,718.32x = 187,528,430.93
  5. Step 5: Solve for x
    x = 187,528,430.93/15,718.32
  6. Step 6: Final answer
    x = 11,930.56

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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.