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Finding the Fourth Proportional to 9,474.80, 14,212.20 and 8,454.20

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Solution

The fourth proportional to 9,474.80, 14,212.20 and 8,454.20 is: 12,681.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,474.80 : 14,212.20 = 8,454.20 : x
  2. Step 2: Convert to fraction form
    9,474.80/14,212.20 = 8,454.20/x
  3. Step 3: Cross multiply
    9,474.80x = 14,212.20 × 8,454.20
  4. Step 4: Simplify right side
    9,474.80x = 120,152,781.24
  5. Step 5: Solve for x
    x = 120,152,781.24/9,474.80
  6. Step 6: Final answer
    x = 12,681.30

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Double 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.