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Finding the Fourth Proportional to 18,992.20, 28,488.30 and 10,244.20

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Solution

The fourth proportional to 18,992.20, 28,488.30 and 10,244.20 is: 15,366.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,992.20 : 28,488.30 = 10,244.20 : x
  2. Step 2: Convert to fraction form
    18,992.20/28,488.30 = 10,244.20/x
  3. Step 3: Cross multiply
    18,992.20x = 28,488.30 × 10,244.20
  4. Step 4: Simplify right side
    18,992.20x = 291,839,842.86
  5. Step 5: Solve for x
    x = 291,839,842.86/18,992.20
  6. Step 6: Final answer
    x = 15,366.30

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Half scale
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Similar ratio
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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.