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Finding the Fourth Proportional to 21,993.76, 32,990.17 and 5,353.88

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Solution

The fourth proportional to 21,993.76, 32,990.17 and 5,353.88 is: 8,030.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,993.76 : 32,990.17 = 5,353.88 : x
  2. Step 2: Convert to fraction form
    21,993.76/32,990.17 = 5,353.88/x
  3. Step 3: Cross multiply
    21,993.76x = 32,990.17 × 5,353.88
  4. Step 4: Simplify right side
    21,993.76x = 176,625,411.36
  5. Step 5: Solve for x
    x = 176,625,411.36/21,993.76
  6. Step 6: Final answer
    x = 8,030.71

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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.