Home / 8,740.92-12,065.50-5,155.78

Finding the Fourth Proportional to 8,740.92, 12,065.50 and 5,155.78

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Solution

The fourth proportional to 8,740.92, 12,065.50 and 5,155.78 is: 7,116.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,740.92 : 12,065.50 = 5,155.78 : x
  2. Step 2: Convert to fraction form
    8,740.92/12,065.50 = 5,155.78/x
  3. Step 3: Cross multiply
    8,740.92x = 12,065.50 × 5,155.78
  4. Step 4: Simplify right side
    8,740.92x = 62,207,063.59
  5. Step 5: Solve for x
    x = 62,207,063.59/8,740.92
  6. Step 6: Final answer
    x = 7,116.76

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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.