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Finding the Fourth Proportional to 12,478.55, 17,224.13 and 7,446.29

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Solution

The fourth proportional to 12,478.55, 17,224.13 and 7,446.29 is: 10,278.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,478.55 : 17,224.13 = 7,446.29 : x
  2. Step 2: Convert to fraction form
    12,478.55/17,224.13 = 7,446.29/x
  3. Step 3: Cross multiply
    12,478.55x = 17,224.13 × 7,446.29
  4. Step 4: Simplify right side
    12,478.55x = 128,255,799.47
  5. Step 5: Solve for x
    x = 128,255,799.47/12,478.55
  6. Step 6: Final answer
    x = 10,278.11

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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.