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Finding the Fourth Proportional to 12,663.60, 18,995.40 and 3,901.20

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Solution

The fourth proportional to 12,663.60, 18,995.40 and 3,901.20 is: 5,851.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,663.60 : 18,995.40 = 3,901.20 : x
  2. Step 2: Convert to fraction form
    12,663.60/18,995.40 = 3,901.20/x
  3. Step 3: Cross multiply
    12,663.60x = 18,995.40 × 3,901.20
  4. Step 4: Simplify right side
    12,663.60x = 74,104,854.48
  5. Step 5: Solve for x
    x = 74,104,854.48/12,663.60
  6. Step 6: Final answer
    x = 5,851.80

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.