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Finding the Fourth Proportional to 38,220.80, 57,217.80 and 28,403.60

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Solution

The fourth proportional to 38,220.80, 57,217.80 and 28,403.60 is: 42,521.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,220.80 : 57,217.80 = 28,403.60 : x
  2. Step 2: Convert to fraction form
    38,220.80/57,217.80 = 28,403.60/x
  3. Step 3: Cross multiply
    38,220.80x = 57,217.80 × 28,403.60
  4. Step 4: Simplify right side
    38,220.80x = 1,625,191,504.08
  5. Step 5: Solve for x
    x = 1,625,191,504.08/38,220.80
  6. Step 6: Final answer
    x = 42,521.13

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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.