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Finding the Fourth Proportional to 8,783.69, 12,115.52 and 5,379.11

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Solution

The fourth proportional to 8,783.69, 12,115.52 and 5,379.11 is: 7,419.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,783.69 : 12,115.52 = 5,379.11 : x
  2. Step 2: Convert to fraction form
    8,783.69/12,115.52 = 5,379.11/x
  3. Step 3: Cross multiply
    8,783.69x = 12,115.52 × 5,379.11
  4. Step 4: Simplify right side
    8,783.69x = 65,170,723.18
  5. Step 5: Solve for x
    x = 65,170,723.18/8,783.69
  6. Step 6: Final answer
    x = 7,419.51

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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.