Home / 5,451.10-8,176.65-1,987.90

Finding the Fourth Proportional to 5,451.10, 8,176.65 and 1,987.90

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Solution

The fourth proportional to 5,451.10, 8,176.65 and 1,987.90 is: 2,981.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,451.10 : 8,176.65 = 1,987.90 : x
  2. Step 2: Convert to fraction form
    5,451.10/8,176.65 = 1,987.90/x
  3. Step 3: Cross multiply
    5,451.10x = 8,176.65 × 1,987.90
  4. Step 4: Simplify right side
    5,451.10x = 16,254,362.54
  5. Step 5: Solve for x
    x = 16,254,362.54/5,451.10
  6. Step 6: Final answer
    x = 2,981.85

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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.