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Finding the Fourth Proportional to 12,479.15, 17,221.01 and 7,102.14

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Solution

The fourth proportional to 12,479.15, 17,221.01 and 7,102.14 is: 9,800.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,479.15 : 17,221.01 = 7,102.14 : x
  2. Step 2: Convert to fraction form
    12,479.15/17,221.01 = 7,102.14/x
  3. Step 3: Cross multiply
    12,479.15x = 17,221.01 × 7,102.14
  4. Step 4: Simplify right side
    12,479.15x = 122,305,988.45
  5. Step 5: Solve for x
    x = 122,305,988.45/12,479.15
  6. Step 6: Final answer
    x = 9,800.83

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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.