Home / 5,425.10-8,137.65-1,321.10

Finding the Fourth Proportional to 5,425.10, 8,137.65 and 1,321.10

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Solution

The fourth proportional to 5,425.10, 8,137.65 and 1,321.10 is: 1,981.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,425.10 : 8,137.65 = 1,321.10 : x
  2. Step 2: Convert to fraction form
    5,425.10/8,137.65 = 1,321.10/x
  3. Step 3: Cross multiply
    5,425.10x = 8,137.65 × 1,321.10
  4. Step 4: Simplify right side
    5,425.10x = 10,750,649.42
  5. Step 5: Solve for x
    x = 10,750,649.42/5,425.10
  6. Step 6: Final answer
    x = 1,981.65

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Half scale
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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.