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Finding the Fourth Proportional to 15,691.50, 21,656.19 and 9,067.50

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Solution

The fourth proportional to 15,691.50, 21,656.19 and 9,067.50 is: 12,514.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,691.50 : 21,656.19 = 9,067.50 : x
  2. Step 2: Convert to fraction form
    15,691.50/21,656.19 = 9,067.50/x
  3. Step 3: Cross multiply
    15,691.50x = 21,656.19 × 9,067.50
  4. Step 4: Simplify right side
    15,691.50x = 196,367,502.83
  5. Step 5: Solve for x
    x = 196,367,502.83/15,691.50
  6. Step 6: Final answer
    x = 12,514.26

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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.