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Finding the Fourth Proportional to 36,279.90, 54,413.46 and 9,978.30

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Solution

The fourth proportional to 36,279.90, 54,413.46 and 9,978.30 is: 14,965.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,279.90 : 54,413.46 = 9,978.30 : x
  2. Step 2: Convert to fraction form
    36,279.90/54,413.46 = 9,978.30/x
  3. Step 3: Cross multiply
    36,279.90x = 54,413.46 × 9,978.30
  4. Step 4: Simplify right side
    36,279.90x = 542,953,827.92
  5. Step 5: Solve for x
    x = 542,953,827.92/36,279.90
  6. Step 6: Final answer
    x = 14,965.69

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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.