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Finding the Fourth Proportional to 28,712.52, 43,042.80 and 10,240.20

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Solution

The fourth proportional to 28,712.52, 43,042.80 and 10,240.20 is: 15,351.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,712.52 : 43,042.80 = 10,240.20 : x
  2. Step 2: Convert to fraction form
    28,712.52/43,042.80 = 10,240.20/x
  3. Step 3: Cross multiply
    28,712.52x = 43,042.80 × 10,240.20
  4. Step 4: Simplify right side
    28,712.52x = 440,766,880.56
  5. Step 5: Solve for x
    x = 440,766,880.56/28,712.52
  6. Step 6: Final answer
    x = 15,351.03

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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.