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Finding the Fourth Proportional to 12,442.60, 17,170.14 and 7,726.78

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Solution

The fourth proportional to 12,442.60, 17,170.14 and 7,726.78 is: 10,662.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,442.60 : 17,170.14 = 7,726.78 : x
  2. Step 2: Convert to fraction form
    12,442.60/17,170.14 = 7,726.78/x
  3. Step 3: Cross multiply
    12,442.60x = 17,170.14 × 7,726.78
  4. Step 4: Simplify right side
    12,442.60x = 132,669,894.35
  5. Step 5: Solve for x
    x = 132,669,894.35/12,442.60
  6. Step 6: Final answer
    x = 10,662.55

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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.