Home / 12,278.64-18,413.36-3,960.80

Finding the Fourth Proportional to 12,278.64, 18,413.36 and 3,960.80

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Solution

The fourth proportional to 12,278.64, 18,413.36 and 3,960.80 is: 5,939.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,278.64 : 18,413.36 = 3,960.80 : x
  2. Step 2: Convert to fraction form
    12,278.64/18,413.36 = 3,960.80/x
  3. Step 3: Cross multiply
    12,278.64x = 18,413.36 × 3,960.80
  4. Step 4: Simplify right side
    12,278.64x = 72,931,636.29
  5. Step 5: Solve for x
    x = 72,931,636.29/12,278.64
  6. Step 6: Final answer
    x = 5,939.72

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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.