Home / 28,188.64-42,279.68-7,413.76

Finding the Fourth Proportional to 28,188.64, 42,279.68 and 7,413.76

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Solution

The fourth proportional to 28,188.64, 42,279.68 and 7,413.76 is: 11,119.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,188.64 : 42,279.68 = 7,413.76 : x
  2. Step 2: Convert to fraction form
    28,188.64/42,279.68 = 7,413.76/x
  3. Step 3: Cross multiply
    28,188.64x = 42,279.68 × 7,413.76
  4. Step 4: Simplify right side
    28,188.64x = 313,451,400.40
  5. Step 5: Solve for x
    x = 313,451,400.40/28,188.64
  6. Step 6: Final answer
    x = 11,119.78

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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.