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Finding the Fourth Proportional to 28,044.86, 42,058.18 and 9,319.86

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Solution

The fourth proportional to 28,044.86, 42,058.18 and 9,319.86 is: 13,976.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,044.86 : 42,058.18 = 9,319.86 : x
  2. Step 2: Convert to fraction form
    28,044.86/42,058.18 = 9,319.86/x
  3. Step 3: Cross multiply
    28,044.86x = 42,058.18 × 9,319.86
  4. Step 4: Simplify right side
    28,044.86x = 391,976,302.86
  5. Step 5: Solve for x
    x = 391,976,302.86/28,044.86
  6. Step 6: Final answer
    x = 13,976.76

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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.