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Finding the Fourth Proportional to 14,920.80, 22,381.20 and 13,279.20

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Solution

The fourth proportional to 14,920.80, 22,381.20 and 13,279.20 is: 19,918.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,920.80 : 22,381.20 = 13,279.20 : x
  2. Step 2: Convert to fraction form
    14,920.80/22,381.20 = 13,279.20/x
  3. Step 3: Cross multiply
    14,920.80x = 22,381.20 × 13,279.20
  4. Step 4: Simplify right side
    14,920.80x = 297,204,431.04
  5. Step 5: Solve for x
    x = 297,204,431.04/14,920.80
  6. Step 6: Final answer
    x = 19,918.80

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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.