Home / 5,139.39-7,092.18-2,870.85

Finding the Fourth Proportional to 5,139.39, 7,092.18 and 2,870.85

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Solution

The fourth proportional to 5,139.39, 7,092.18 and 2,870.85 is: 3,961.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,139.39 : 7,092.18 = 2,870.85 : x
  2. Step 2: Convert to fraction form
    5,139.39/7,092.18 = 2,870.85/x
  3. Step 3: Cross multiply
    5,139.39x = 7,092.18 × 2,870.85
  4. Step 4: Simplify right side
    5,139.39x = 20,360,599.68
  5. Step 5: Solve for x
    x = 20,360,599.68/5,139.39
  6. Step 6: Final answer
    x = 3,961.68

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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.