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Finding the Fourth Proportional to 22,920.40, 34,348.20 and 14,129.20

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Solution

The fourth proportional to 22,920.40, 34,348.20 and 14,129.20 is: 21,173.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,920.40 : 34,348.20 = 14,129.20 : x
  2. Step 2: Convert to fraction form
    22,920.40/34,348.20 = 14,129.20/x
  3. Step 3: Cross multiply
    22,920.40x = 34,348.20 × 14,129.20
  4. Step 4: Simplify right side
    22,920.40x = 485,312,587.44
  5. Step 5: Solve for x
    x = 485,312,587.44/22,920.40
  6. Step 6: Final answer
    x = 21,173.83

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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.