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Finding the Fourth Proportional to 15,039.60, 20,756.43 and 8,751.96

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Solution

The fourth proportional to 15,039.60, 20,756.43 and 8,751.96 is: 12,078.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,039.60 : 20,756.43 = 8,751.96 : x
  2. Step 2: Convert to fraction form
    15,039.60/20,756.43 = 8,751.96/x
  3. Step 3: Cross multiply
    15,039.60x = 20,756.43 × 8,751.96
  4. Step 4: Simplify right side
    15,039.60x = 181,659,445.10
  5. Step 5: Solve for x
    x = 181,659,445.10/15,039.60
  6. Step 6: Final answer
    x = 12,078.74

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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.