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Finding the Fourth Proportional to 15,882.66, 21,919.06 and 9,169.52

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Solution

The fourth proportional to 15,882.66, 21,919.06 and 9,169.52 is: 12,654.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,882.66 : 21,919.06 = 9,169.52 : x
  2. Step 2: Convert to fraction form
    15,882.66/21,919.06 = 9,169.52/x
  3. Step 3: Cross multiply
    15,882.66x = 21,919.06 × 9,169.52
  4. Step 4: Simplify right side
    15,882.66x = 200,987,259.05
  5. Step 5: Solve for x
    x = 200,987,259.05/15,882.66
  6. Step 6: Final answer
    x = 12,654.51

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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.