Home / 3,445.28-5,186.68-3,139.10

Finding the Fourth Proportional to 3,445.28, 5,186.68 and 3,139.10

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Solution

The fourth proportional to 3,445.28, 5,186.68 and 3,139.10 is: 4,725.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,445.28 : 5,186.68 = 3,139.10 : x
  2. Step 2: Convert to fraction form
    3,445.28/5,186.68 = 3,139.10/x
  3. Step 3: Cross multiply
    3,445.28x = 5,186.68 × 3,139.10
  4. Step 4: Simplify right side
    3,445.28x = 16,281,507.19
  5. Step 5: Solve for x
    x = 16,281,507.19/3,445.28
  6. Step 6: Final answer
    x = 4,725.74

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Half scale
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Double scale
Find fourth proportional to 3,446.28, 5,188.19 and 3,140.10
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.