Home / 3,938.10-5,431.50-2,445.18

Finding the Fourth Proportional to 3,938.10, 5,431.50 and 2,445.18

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Solution

The fourth proportional to 3,938.10, 5,431.50 and 2,445.18 is: 3,372.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,938.10 : 5,431.50 = 2,445.18 : x
  2. Step 2: Convert to fraction form
    3,938.10/5,431.50 = 2,445.18/x
  3. Step 3: Cross multiply
    3,938.10x = 5,431.50 × 2,445.18
  4. Step 4: Simplify right side
    3,938.10x = 13,280,995.17
  5. Step 5: Solve for x
    x = 13,280,995.17/3,938.10
  6. Step 6: Final answer
    x = 3,372.44

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Half scale
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Double scale
Find fourth proportional to 3,939.10, 5,432.88 and 2,446.18
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.