Home / 5,119.12-7,064.28-3,129.70

Finding the Fourth Proportional to 5,119.12, 7,064.28 and 3,129.70

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Solution

The fourth proportional to 5,119.12, 7,064.28 and 3,129.70 is: 4,318.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,119.12 : 7,064.28 = 3,129.70 : x
  2. Step 2: Convert to fraction form
    5,119.12/7,064.28 = 3,129.70/x
  3. Step 3: Cross multiply
    5,119.12x = 7,064.28 × 3,129.70
  4. Step 4: Simplify right side
    5,119.12x = 22,109,077.12
  5. Step 5: Solve for x
    x = 22,109,077.12/5,119.12
  6. Step 6: Final answer
    x = 4,318.92

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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.