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Finding the Fourth Proportional to 18,897.88, 28,338.62 and 5,747.18

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Solution

The fourth proportional to 18,897.88, 28,338.62 and 5,747.18 is: 8,618.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,897.88 : 28,338.62 = 5,747.18 : x
  2. Step 2: Convert to fraction form
    18,897.88/28,338.62 = 5,747.18/x
  3. Step 3: Cross multiply
    18,897.88x = 28,338.62 × 5,747.18
  4. Step 4: Simplify right side
    18,897.88x = 162,867,150.09
  5. Step 5: Solve for x
    x = 162,867,150.09/18,897.88
  6. Step 6: Final answer
    x = 8,618.28

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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.