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Finding the Fourth Proportional to 38,686.80, 57,957.30 and 19,902.90

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Solution

The fourth proportional to 38,686.80, 57,957.30 and 19,902.90 is: 29,816.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,686.80 : 57,957.30 = 19,902.90 : x
  2. Step 2: Convert to fraction form
    38,686.80/57,957.30 = 19,902.90/x
  3. Step 3: Cross multiply
    38,686.80x = 57,957.30 × 19,902.90
  4. Step 4: Simplify right side
    38,686.80x = 1,153,518,346.17
  5. Step 5: Solve for x
    x = 1,153,518,346.17/38,686.80
  6. Step 6: Final answer
    x = 29,816.85

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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.