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Finding the Fourth Proportional to 18,937.08, 28,404.72 and 5,086.08

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Solution

The fourth proportional to 18,937.08, 28,404.72 and 5,086.08 is: 7,628.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,937.08 : 28,404.72 = 5,086.08 : x
  2. Step 2: Convert to fraction form
    18,937.08/28,404.72 = 5,086.08/x
  3. Step 3: Cross multiply
    18,937.08x = 28,404.72 × 5,086.08
  4. Step 4: Simplify right side
    18,937.08x = 144,468,678.30
  5. Step 5: Solve for x
    x = 144,468,678.30/18,937.08
  6. Step 6: Final answer
    x = 7,628.88

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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.