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Finding the Fourth Proportional to 13,279.80, 19,921.14 and 4,963.80

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Solution

The fourth proportional to 13,279.80, 19,921.14 and 4,963.80 is: 7,446.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,279.80 : 19,921.14 = 4,963.80 : x
  2. Step 2: Convert to fraction form
    13,279.80/19,921.14 = 4,963.80/x
  3. Step 3: Cross multiply
    13,279.80x = 19,921.14 × 4,963.80
  4. Step 4: Simplify right side
    13,279.80x = 98,884,554.73
  5. Step 5: Solve for x
    x = 98,884,554.73/13,279.80
  6. Step 6: Final answer
    x = 7,446.24

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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.