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Finding the Fourth Proportional to 20,618.52, 30,964.12 and 15,354.96

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Solution

The fourth proportional to 20,618.52, 30,964.12 and 15,354.96 is: 23,059.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,618.52 : 30,964.12 = 15,354.96 : x
  2. Step 2: Convert to fraction form
    20,618.52/30,964.12 = 15,354.96/x
  3. Step 3: Cross multiply
    20,618.52x = 30,964.12 × 15,354.96
  4. Step 4: Simplify right side
    20,618.52x = 475,452,824.04
  5. Step 5: Solve for x
    x = 475,452,824.04/20,618.52
  6. Step 6: Final answer
    x = 23,059.50

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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.