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Finding the Fourth Proportional to 20,488.56, 30,736.17 and 9,959.19

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Solution

The fourth proportional to 20,488.56, 30,736.17 and 9,959.19 is: 14,940.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,488.56 : 30,736.17 = 9,959.19 : x
  2. Step 2: Convert to fraction form
    20,488.56/30,736.17 = 9,959.19/x
  3. Step 3: Cross multiply
    20,488.56x = 30,736.17 × 9,959.19
  4. Step 4: Simplify right side
    20,488.56x = 306,107,356.90
  5. Step 5: Solve for x
    x = 306,107,356.90/20,488.56
  6. Step 6: Final answer
    x = 14,940.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.