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Finding the Fourth Proportional to 19,902.87, 29,854.39 and 18,905.16

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Solution

The fourth proportional to 19,902.87, 29,854.39 and 18,905.16 is: 28,357.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,902.87 : 29,854.39 = 18,905.16 : x
  2. Step 2: Convert to fraction form
    19,902.87/29,854.39 = 18,905.16/x
  3. Step 3: Cross multiply
    19,902.87x = 29,854.39 × 18,905.16
  4. Step 4: Simplify right side
    19,902.87x = 564,402,019.65
  5. Step 5: Solve for x
    x = 564,402,019.65/19,902.87
  6. Step 6: Final answer
    x = 28,357.82

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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.