Home / 5,139.45-7,709.98-2,177.90

Finding the Fourth Proportional to 5,139.45, 7,709.98 and 2,177.90

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Solution

The fourth proportional to 5,139.45, 7,709.98 and 2,177.90 is: 3,267.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,139.45 : 7,709.98 = 2,177.90 : x
  2. Step 2: Convert to fraction form
    5,139.45/7,709.98 = 2,177.90/x
  3. Step 3: Cross multiply
    5,139.45x = 7,709.98 × 2,177.90
  4. Step 4: Simplify right side
    5,139.45x = 16,791,521.45
  5. Step 5: Solve for x
    x = 16,791,521.45/5,139.45
  6. Step 6: Final answer
    x = 3,267.18

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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.