Home / 8,139.77-12,210.61-2,591.17

Finding the Fourth Proportional to 8,139.77, 12,210.61 and 2,591.17

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Solution

The fourth proportional to 8,139.77, 12,210.61 and 2,591.17 is: 3,887.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,139.77 : 12,210.61 = 2,591.17 : x
  2. Step 2: Convert to fraction form
    8,139.77/12,210.61 = 2,591.17/x
  3. Step 3: Cross multiply
    8,139.77x = 12,210.61 × 2,591.17
  4. Step 4: Simplify right side
    8,139.77x = 31,639,766.31
  5. Step 5: Solve for x
    x = 31,639,766.31/8,139.77
  6. Step 6: Final answer
    x = 3,887.06

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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.