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Finding the Fourth Proportional to 20,476.80, 28,250.94 and 12,413.06

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Solution

The fourth proportional to 20,476.80, 28,250.94 and 12,413.06 is: 17,125.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,476.80 : 28,250.94 = 12,413.06 : x
  2. Step 2: Convert to fraction form
    20,476.80/28,250.94 = 12,413.06/x
  3. Step 3: Cross multiply
    20,476.80x = 28,250.94 × 12,413.06
  4. Step 4: Simplify right side
    20,476.80x = 350,680,472.02
  5. Step 5: Solve for x
    x = 350,680,472.02/20,476.80
  6. Step 6: Final answer
    x = 17,125.75

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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.