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Finding the Fourth Proportional to 84,013.88, 126,017.57 and 20,834.15

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Solution

The fourth proportional to 84,013.88, 126,017.57 and 20,834.15 is: 31,250.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,013.88 : 126,017.57 = 20,834.15 : x
  2. Step 2: Convert to fraction form
    84,013.88/126,017.57 = 20,834.15/x
  3. Step 3: Cross multiply
    84,013.88x = 126,017.57 × 20,834.15
  4. Step 4: Simplify right side
    84,013.88x = 2,625,468,378.01
  5. Step 5: Solve for x
    x = 2,625,468,378.01/84,013.88
  6. Step 6: Final answer
    x = 31,250.41

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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.