Home / 20,912.28-28,854.58-12,413.20

Finding the Fourth Proportional to 20,912.28, 28,854.58 and 12,413.20

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Solution

The fourth proportional to 20,912.28, 28,854.58 and 12,413.20 is: 17,127.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,912.28 : 28,854.58 = 12,413.20 : x
  2. Step 2: Convert to fraction form
    20,912.28/28,854.58 = 12,413.20/x
  3. Step 3: Cross multiply
    20,912.28x = 28,854.58 × 12,413.20
  4. Step 4: Simplify right side
    20,912.28x = 358,177,646.66
  5. Step 5: Solve for x
    x = 358,177,646.66/20,912.28
  6. Step 6: Final answer
    x = 17,127.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.