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Finding the Fourth Proportional to 18,771, 28,157.80 and 6,290.52

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Solution

The fourth proportional to 18,771, 28,157.80 and 6,290.52 is: 9,436.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,771 : 28,157.80 = 6,290.52 : x
  2. Step 2: Convert to fraction form
    18,771/28,157.80 = 6,290.52/x
  3. Step 3: Cross multiply
    18,771x = 28,157.80 × 6,290.52
  4. Step 4: Simplify right side
    18,771x = 177,127,204.06
  5. Step 5: Solve for x
    x = 177,127,204.06/18,771
  6. Step 6: Final answer
    x = 9,436.22

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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.