Home / 20,334.50-28,079.12-12,793.40

Finding the Fourth Proportional to 20,334.50, 28,079.12 and 12,793.40

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Solution

The fourth proportional to 20,334.50, 28,079.12 and 12,793.40 is: 17,665.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,334.50 : 28,079.12 = 12,793.40 : x
  2. Step 2: Convert to fraction form
    20,334.50/28,079.12 = 12,793.40/x
  3. Step 3: Cross multiply
    20,334.50x = 28,079.12 × 12,793.40
  4. Step 4: Simplify right side
    20,334.50x = 359,227,413.81
  5. Step 5: Solve for x
    x = 359,227,413.81/20,334.50
  6. Step 6: Final answer
    x = 17,665.91

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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.