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Finding the Fourth Proportional to 38,425.80, 57,561.90 and 21,990.60

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Solution

The fourth proportional to 38,425.80, 57,561.90 and 21,990.60 is: 32,941.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,425.80 : 57,561.90 = 21,990.60 : x
  2. Step 2: Convert to fraction form
    38,425.80/57,561.90 = 21,990.60/x
  3. Step 3: Cross multiply
    38,425.80x = 57,561.90 × 21,990.60
  4. Step 4: Simplify right side
    38,425.80x = 1,265,820,718.14
  5. Step 5: Solve for x
    x = 1,265,820,718.14/38,425.80
  6. Step 6: Final answer
    x = 32,941.95

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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.