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Finding the Fourth Proportional to 8,752.75, 13,129.11 and 2,178.94

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Solution

The fourth proportional to 8,752.75, 13,129.11 and 2,178.94 is: 3,268.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,752.75 : 13,129.11 = 2,178.94 : x
  2. Step 2: Convert to fraction form
    8,752.75/13,129.11 = 2,178.94/x
  3. Step 3: Cross multiply
    8,752.75x = 13,129.11 × 2,178.94
  4. Step 4: Simplify right side
    8,752.75x = 28,607,499.23
  5. Step 5: Solve for x
    x = 28,607,499.23/8,752.75
  6. Step 6: Final answer
    x = 3,268.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.