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Finding the Fourth Proportional to 8,811.25, 13,218.99 and 2,888.57

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Solution

The fourth proportional to 8,811.25, 13,218.99 and 2,888.57 is: 4,333.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,811.25 : 13,218.99 = 2,888.57 : x
  2. Step 2: Convert to fraction form
    8,811.25/13,218.99 = 2,888.57/x
  3. Step 3: Cross multiply
    8,811.25x = 13,218.99 × 2,888.57
  4. Step 4: Simplify right side
    8,811.25x = 38,184,000.16
  5. Step 5: Solve for x
    x = 38,184,000.16/8,811.25
  6. Step 6: Final answer
    x = 4,333.55

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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.