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Finding the Fourth Proportional to 15,039.76, 20,737.92 and 9,727.60

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Solution

The fourth proportional to 15,039.76, 20,737.92 and 9,727.60 is: 13,413.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,039.76 : 20,737.92 = 9,727.60 : x
  2. Step 2: Convert to fraction form
    15,039.76/20,737.92 = 9,727.60/x
  3. Step 3: Cross multiply
    15,039.76x = 20,737.92 × 9,727.60
  4. Step 4: Simplify right side
    15,039.76x = 201,730,190.59
  5. Step 5: Solve for x
    x = 201,730,190.59/15,039.76
  6. Step 6: Final answer
    x = 13,413.13

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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.