Home / 15,719.07-21,691.71-8,645.43

Finding the Fourth Proportional to 15,719.07, 21,691.71 and 8,645.43

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Solution

The fourth proportional to 15,719.07, 21,691.71 and 8,645.43 is: 11,930.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,719.07 : 21,691.71 = 8,645.43 : x
  2. Step 2: Convert to fraction form
    15,719.07/21,691.71 = 8,645.43/x
  3. Step 3: Cross multiply
    15,719.07x = 21,691.71 × 8,645.43
  4. Step 4: Simplify right side
    15,719.07x = 187,534,160.39
  5. Step 5: Solve for x
    x = 187,534,160.39/15,719.07
  6. Step 6: Final answer
    x = 11,930.36

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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.