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Finding the Fourth Proportional to 18,957.38, 28,241.49 and 18,104.45

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Solution

The fourth proportional to 18,957.38, 28,241.49 and 18,104.45 is: 26,970.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,957.38 : 28,241.49 = 18,104.45 : x
  2. Step 2: Convert to fraction form
    18,957.38/28,241.49 = 18,104.45/x
  3. Step 3: Cross multiply
    18,957.38x = 28,241.49 × 18,104.45
  4. Step 4: Simplify right side
    18,957.38x = 511,296,502.42
  5. Step 5: Solve for x
    x = 511,296,502.42/18,957.38
  6. Step 6: Final answer
    x = 26,970.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.