Home / 18,920.17-28,382.61-6,439.24

Finding the Fourth Proportional to 18,920.17, 28,382.61 and 6,439.24

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Solution

The fourth proportional to 18,920.17, 28,382.61 and 6,439.24 is: 9,659.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,920.17 : 28,382.61 = 6,439.24 : x
  2. Step 2: Convert to fraction form
    18,920.17/28,382.61 = 6,439.24/x
  3. Step 3: Cross multiply
    18,920.17x = 28,382.61 × 6,439.24
  4. Step 4: Simplify right side
    18,920.17x = 182,762,351.30
  5. Step 5: Solve for x
    x = 182,762,351.30/18,920.17
  6. Step 6: Final answer
    x = 9,659.66

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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.