Home / 8,139.24-12,179.70-7,047.36

Finding the Fourth Proportional to 8,139.24, 12,179.70 and 7,047.36

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Solution

The fourth proportional to 8,139.24, 12,179.70 and 7,047.36 is: 10,545.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,139.24 : 12,179.70 = 7,047.36 : x
  2. Step 2: Convert to fraction form
    8,139.24/12,179.70 = 7,047.36/x
  3. Step 3: Cross multiply
    8,139.24x = 12,179.70 × 7,047.36
  4. Step 4: Simplify right side
    8,139.24x = 85,834,730.59
  5. Step 5: Solve for x
    x = 85,834,730.59/8,139.24
  6. Step 6: Final answer
    x = 10,545.79

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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.