Home / 5,108.68-7,049.60-2,870.20

Finding the Fourth Proportional to 5,108.68, 7,049.60 and 2,870.20

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Solution

The fourth proportional to 5,108.68, 7,049.60 and 2,870.20 is: 3,960.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,108.68 : 7,049.60 = 2,870.20 : x
  2. Step 2: Convert to fraction form
    5,108.68/7,049.60 = 2,870.20/x
  3. Step 3: Cross multiply
    5,108.68x = 7,049.60 × 2,870.20
  4. Step 4: Simplify right side
    5,108.68x = 20,233,747.57
  5. Step 5: Solve for x
    x = 20,233,747.57/5,108.68
  6. Step 6: Final answer
    x = 3,960.66

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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.