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Finding the Fourth Proportional to 28,171.80, 42,209.10 and 13,348.80

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Solution

The fourth proportional to 28,171.80, 42,209.10 and 13,348.80 is: 20,000.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,171.80 : 42,209.10 = 13,348.80 : x
  2. Step 2: Convert to fraction form
    28,171.80/42,209.10 = 13,348.80/x
  3. Step 3: Cross multiply
    28,171.80x = 42,209.10 × 13,348.80
  4. Step 4: Simplify right side
    28,171.80x = 563,440,834.08
  5. Step 5: Solve for x
    x = 563,440,834.08/28,171.80
  6. Step 6: Final answer
    x = 20,000.17

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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.