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Finding the Fourth Proportional to 18,909.52, 28,362.12 and 5,057.44

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Solution

The fourth proportional to 18,909.52, 28,362.12 and 5,057.44 is: 7,585.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,909.52 : 28,362.12 = 5,057.44 : x
  2. Step 2: Convert to fraction form
    18,909.52/28,362.12 = 5,057.44/x
  3. Step 3: Cross multiply
    18,909.52x = 28,362.12 × 5,057.44
  4. Step 4: Simplify right side
    18,909.52x = 143,439,630.30
  5. Step 5: Solve for x
    x = 143,439,630.30/18,909.52
  6. Step 6: Final answer
    x = 7,585.58

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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.