Home / 8,759.40-13,139.10-7,665.90

Finding the Fourth Proportional to 8,759.40, 13,139.10 and 7,665.90

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Solution

The fourth proportional to 8,759.40, 13,139.10 and 7,665.90 is: 11,498.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,759.40 : 13,139.10 = 7,665.90 : x
  2. Step 2: Convert to fraction form
    8,759.40/13,139.10 = 7,665.90/x
  3. Step 3: Cross multiply
    8,759.40x = 13,139.10 × 7,665.90
  4. Step 4: Simplify right side
    8,759.40x = 100,723,026.69
  5. Step 5: Solve for x
    x = 100,723,026.69/8,759.40
  6. Step 6: Final answer
    x = 11,498.85

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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.