Home / 5,139.70-7,710.35-2,178.15

Finding the Fourth Proportional to 5,139.70, 7,710.35 and 2,178.15

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Solution

The fourth proportional to 5,139.70, 7,710.35 and 2,178.15 is: 3,267.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,139.70 : 7,710.35 = 2,178.15 : x
  2. Step 2: Convert to fraction form
    5,139.70/7,710.35 = 2,178.15/x
  3. Step 3: Cross multiply
    5,139.70x = 7,710.35 × 2,178.15
  4. Step 4: Simplify right side
    5,139.70x = 16,794,298.85
  5. Step 5: Solve for x
    x = 16,794,298.85/5,139.70
  6. Step 6: Final answer
    x = 3,267.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.