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Finding the Fourth Proportional to 21,873.20, 32,809.80 and 9,391.10

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Solution

The fourth proportional to 21,873.20, 32,809.80 and 9,391.10 is: 14,086.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,873.20 : 32,809.80 = 9,391.10 : x
  2. Step 2: Convert to fraction form
    21,873.20/32,809.80 = 9,391.10/x
  3. Step 3: Cross multiply
    21,873.20x = 32,809.80 × 9,391.10
  4. Step 4: Simplify right side
    21,873.20x = 308,120,112.78
  5. Step 5: Solve for x
    x = 308,120,112.78/21,873.20
  6. Step 6: Final answer
    x = 14,086.65

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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.