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Finding the Fourth Proportional to 18,978.43, 28,484.93 and 10,101.22

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Solution

The fourth proportional to 18,978.43, 28,484.93 and 10,101.22 is: 15,161.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,978.43 : 28,484.93 = 10,101.22 : x
  2. Step 2: Convert to fraction form
    18,978.43/28,484.93 = 10,101.22/x
  3. Step 3: Cross multiply
    18,978.43x = 28,484.93 × 10,101.22
  4. Step 4: Simplify right side
    18,978.43x = 287,732,374.01
  5. Step 5: Solve for x
    x = 287,732,374.01/18,978.43
  6. Step 6: Final answer
    x = 15,161.02

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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.