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Finding the Fourth Proportional to 15,909.88, 21,955.74 and 9,195.52

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Solution

The fourth proportional to 15,909.88, 21,955.74 and 9,195.52 is: 12,689.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,909.88 : 21,955.74 = 9,195.52 : x
  2. Step 2: Convert to fraction form
    15,909.88/21,955.74 = 9,195.52/x
  3. Step 3: Cross multiply
    15,909.88x = 21,955.74 × 9,195.52
  4. Step 4: Simplify right side
    15,909.88x = 201,894,446.28
  5. Step 5: Solve for x
    x = 201,894,446.28/15,909.88
  6. Step 6: Final answer
    x = 12,689.88

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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.