Home / 8,639.85-11,924.78-5,618.76

Finding the Fourth Proportional to 8,639.85, 11,924.78 and 5,618.76

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Solution

The fourth proportional to 8,639.85, 11,924.78 and 5,618.76 is: 7,755.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,639.85 : 11,924.78 = 5,618.76 : x
  2. Step 2: Convert to fraction form
    8,639.85/11,924.78 = 5,618.76/x
  3. Step 3: Cross multiply
    8,639.85x = 11,924.78 × 5,618.76
  4. Step 4: Simplify right side
    8,639.85x = 67,002,476.87
  5. Step 5: Solve for x
    x = 67,002,476.87/8,639.85
  6. Step 6: Final answer
    x = 7,755.05

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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.