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Finding the Fourth Proportional to 28,290.80, 42,436.20 and 27,561.80

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Solution

The fourth proportional to 28,290.80, 42,436.20 and 27,561.80 is: 41,342.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,290.80 : 42,436.20 = 27,561.80 : x
  2. Step 2: Convert to fraction form
    28,290.80/42,436.20 = 27,561.80/x
  3. Step 3: Cross multiply
    28,290.80x = 42,436.20 × 27,561.80
  4. Step 4: Simplify right side
    28,290.80x = 1,169,618,057.16
  5. Step 5: Solve for x
    x = 1,169,618,057.16/28,290.80
  6. Step 6: Final answer
    x = 41,342.70

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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.