Home / 5,119.60-7,065.72-3,129.76

Finding the Fourth Proportional to 5,119.60, 7,065.72 and 3,129.76

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Solution

The fourth proportional to 5,119.60, 7,065.72 and 3,129.76 is: 4,319.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,119.60 : 7,065.72 = 3,129.76 : x
  2. Step 2: Convert to fraction form
    5,119.60/7,065.72 = 3,129.76/x
  3. Step 3: Cross multiply
    5,119.60x = 7,065.72 × 3,129.76
  4. Step 4: Simplify right side
    5,119.60x = 22,114,007.83
  5. Step 5: Solve for x
    x = 22,114,007.83/5,119.60
  6. Step 6: Final answer
    x = 4,319.48

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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.