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Finding the Fourth Proportional to 14,993.58, 20,691 and 8,279.20

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Solution

The fourth proportional to 14,993.58, 20,691 and 8,279.20 is: 11,425.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,993.58 : 20,691 = 8,279.20 : x
  2. Step 2: Convert to fraction form
    14,993.58/20,691 = 8,279.20/x
  3. Step 3: Cross multiply
    14,993.58x = 20,691 × 8,279.20
  4. Step 4: Simplify right side
    14,993.58x = 171,304,927.20
  5. Step 5: Solve for x
    x = 171,304,927.20/14,993.58
  6. Step 6: Final answer
    x = 11,425.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.