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Finding the Fourth Proportional to 28,101.90, 42,201.45 and 14,979.90

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Solution

The fourth proportional to 28,101.90, 42,201.45 and 14,979.90 is: 22,495.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,101.90 : 42,201.45 = 14,979.90 : x
  2. Step 2: Convert to fraction form
    28,101.90/42,201.45 = 14,979.90/x
  3. Step 3: Cross multiply
    28,101.90x = 42,201.45 × 14,979.90
  4. Step 4: Simplify right side
    28,101.90x = 632,173,500.86
  5. Step 5: Solve for x
    x = 632,173,500.86/28,101.90
  6. Step 6: Final answer
    x = 22,495.76

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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.