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Finding the Fourth Proportional to 13,624.55, 18,801.28 and 7,959.82

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Solution

The fourth proportional to 13,624.55, 18,801.28 and 7,959.82 is: 10,984.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,624.55 : 18,801.28 = 7,959.82 : x
  2. Step 2: Convert to fraction form
    13,624.55/18,801.28 = 7,959.82/x
  3. Step 3: Cross multiply
    13,624.55x = 18,801.28 × 7,959.82
  4. Step 4: Simplify right side
    13,624.55x = 149,654,764.77
  5. Step 5: Solve for x
    x = 149,654,764.77/13,624.55
  6. Step 6: Final answer
    x = 10,984.20

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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.