Home / 28,146.68-42,213.70-8,422.71

Finding the Fourth Proportional to 28,146.68, 42,213.70 and 8,422.71

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Solution

The fourth proportional to 28,146.68, 42,213.70 and 8,422.71 is: 12,632.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,146.68 : 42,213.70 = 8,422.71 : x
  2. Step 2: Convert to fraction form
    28,146.68/42,213.70 = 8,422.71/x
  3. Step 3: Cross multiply
    28,146.68x = 42,213.70 × 8,422.71
  4. Step 4: Simplify right side
    28,146.68x = 355,553,753.13
  5. Step 5: Solve for x
    x = 355,553,753.13/28,146.68
  6. Step 6: Final answer
    x = 12,632.17

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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.