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Finding the Fourth Proportional to 19,200.20, 28,767.90 and 9,318.20

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Solution

The fourth proportional to 19,200.20, 28,767.90 and 9,318.20 is: 13,961.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,200.20 : 28,767.90 = 9,318.20 : x
  2. Step 2: Convert to fraction form
    19,200.20/28,767.90 = 9,318.20/x
  3. Step 3: Cross multiply
    19,200.20x = 28,767.90 × 9,318.20
  4. Step 4: Simplify right side
    19,200.20x = 268,065,045.78
  5. Step 5: Solve for x
    x = 268,065,045.78/19,200.20
  6. Step 6: Final answer
    x = 13,961.58

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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.