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Finding the Fourth Proportional to 28,520.80, 42,700.20 and 26,969.20

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Solution

The fourth proportional to 28,520.80, 42,700.20 and 26,969.20 is: 40,377.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,520.80 : 42,700.20 = 26,969.20 : x
  2. Step 2: Convert to fraction form
    28,520.80/42,700.20 = 26,969.20/x
  3. Step 3: Cross multiply
    28,520.80x = 42,700.20 × 26,969.20
  4. Step 4: Simplify right side
    28,520.80x = 1,151,590,233.84
  5. Step 5: Solve for x
    x = 1,151,590,233.84/28,520.80
  6. Step 6: Final answer
    x = 40,377.21

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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.