Home / 5,545.35-8,318.84-1,987.20

Finding the Fourth Proportional to 5,545.35, 8,318.84 and 1,987.20

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Solution

The fourth proportional to 5,545.35, 8,318.84 and 1,987.20 is: 2,981.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,545.35 : 8,318.84 = 1,987.20 : x
  2. Step 2: Convert to fraction form
    5,545.35/8,318.84 = 1,987.20/x
  3. Step 3: Cross multiply
    5,545.35x = 8,318.84 × 1,987.20
  4. Step 4: Simplify right side
    5,545.35x = 16,531,188.91
  5. Step 5: Solve for x
    x = 16,531,188.91/5,545.35
  6. Step 6: Final answer
    x = 2,981.09

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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.