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Finding the Fourth Proportional to 18,897.78, 28,346.04 and 10,149.78

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Solution

The fourth proportional to 18,897.78, 28,346.04 and 10,149.78 is: 15,224.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,897.78 : 28,346.04 = 10,149.78 : x
  2. Step 2: Convert to fraction form
    18,897.78/28,346.04 = 10,149.78/x
  3. Step 3: Cross multiply
    18,897.78x = 28,346.04 × 10,149.78
  4. Step 4: Simplify right side
    18,897.78x = 287,706,069.87
  5. Step 5: Solve for x
    x = 287,706,069.87/18,897.78
  6. Step 6: Final answer
    x = 15,224.33

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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.