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Finding the Fourth Proportional to 28,425.89, 42,640.88 and 8,701.88

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Solution

The fourth proportional to 28,425.89, 42,640.88 and 8,701.88 is: 13,053.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,425.89 : 42,640.88 = 8,701.88 : x
  2. Step 2: Convert to fraction form
    28,425.89/42,640.88 = 8,701.88/x
  3. Step 3: Cross multiply
    28,425.89x = 42,640.88 × 8,701.88
  4. Step 4: Simplify right side
    28,425.89x = 371,055,852.94
  5. Step 5: Solve for x
    x = 371,055,852.94/28,425.89
  6. Step 6: Final answer
    x = 13,053.45

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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.