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Finding the Fourth Proportional to 28,087.13, 38,743.03 and 19,138.66

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Solution

The fourth proportional to 28,087.13, 38,743.03 and 19,138.66 is: 26,399.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,087.13 : 38,743.03 = 19,138.66 : x
  2. Step 2: Convert to fraction form
    28,087.13/38,743.03 = 19,138.66/x
  3. Step 3: Cross multiply
    28,087.13x = 38,743.03 × 19,138.66
  4. Step 4: Simplify right side
    28,087.13x = 741,489,678.54
  5. Step 5: Solve for x
    x = 741,489,678.54/28,087.13
  6. Step 6: Final answer
    x = 26,399.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.