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Finding the Fourth Proportional to 21,843.59, 32,780.53 and 9,998.81

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Solution

The fourth proportional to 21,843.59, 32,780.53 and 9,998.81 is: 15,005.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,843.59 : 32,780.53 = 9,998.81 : x
  2. Step 2: Convert to fraction form
    21,843.59/32,780.53 = 9,998.81/x
  3. Step 3: Cross multiply
    21,843.59x = 32,780.53 × 9,998.81
  4. Step 4: Simplify right side
    21,843.59x = 327,766,291.17
  5. Step 5: Solve for x
    x = 327,766,291.17/21,843.59
  6. Step 6: Final answer
    x = 15,005.15

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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.