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Finding the Fourth Proportional to 19,953.44, 29,930.16 and 8,259.20

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Solution

The fourth proportional to 19,953.44, 29,930.16 and 8,259.20 is: 12,388.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,953.44 : 29,930.16 = 8,259.20 : x
  2. Step 2: Convert to fraction form
    19,953.44/29,930.16 = 8,259.20/x
  3. Step 3: Cross multiply
    19,953.44x = 29,930.16 × 8,259.20
  4. Step 4: Simplify right side
    19,953.44x = 247,199,177.47
  5. Step 5: Solve for x
    x = 247,199,177.47/19,953.44
  6. Step 6: Final answer
    x = 12,388.80

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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.