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Finding the Fourth Proportional to 55,342.80, 82,989.36 and 15,891.12

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Solution

The fourth proportional to 55,342.80, 82,989.36 and 15,891.12 is: 23,829.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,342.80 : 82,989.36 = 15,891.12 : x
  2. Step 2: Convert to fraction form
    55,342.80/82,989.36 = 15,891.12/x
  3. Step 3: Cross multiply
    55,342.80x = 82,989.36 × 15,891.12
  4. Step 4: Simplify right side
    55,342.80x = 1,318,793,878.48
  5. Step 5: Solve for x
    x = 1,318,793,878.48/55,342.80
  6. Step 6: Final answer
    x = 23,829.55

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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.