Home / 12,423.28-17,146.56-7,121.66

Finding the Fourth Proportional to 12,423.28, 17,146.56 and 7,121.66

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Solution

The fourth proportional to 12,423.28, 17,146.56 and 7,121.66 is: 9,829.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,423.28 : 17,146.56 = 7,121.66 : x
  2. Step 2: Convert to fraction form
    12,423.28/17,146.56 = 7,121.66/x
  3. Step 3: Cross multiply
    12,423.28x = 17,146.56 × 7,121.66
  4. Step 4: Simplify right side
    12,423.28x = 122,111,970.49
  5. Step 5: Solve for x
    x = 122,111,970.49/12,423.28
  6. Step 6: Final answer
    x = 9,829.29

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Similar ratio
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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.