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Finding the Fourth Proportional to 21,999.76, 32,999.16 and 5,359.90

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Solution

The fourth proportional to 21,999.76, 32,999.16 and 5,359.90 is: 8,039.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,999.76 : 32,999.16 = 5,359.90 : x
  2. Step 2: Convert to fraction form
    21,999.76/32,999.16 = 5,359.90/x
  3. Step 3: Cross multiply
    21,999.76x = 32,999.16 × 5,359.90
  4. Step 4: Simplify right side
    21,999.76x = 176,872,197.68
  5. Step 5: Solve for x
    x = 176,872,197.68/21,999.76
  6. Step 6: Final answer
    x = 8,039.73

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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.