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Finding the Fourth Proportional to 8,867.12, 13,288.16 and 4,920.13

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Solution

The fourth proportional to 8,867.12, 13,288.16 and 4,920.13 is: 7,373.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,867.12 : 13,288.16 = 4,920.13 : x
  2. Step 2: Convert to fraction form
    8,867.12/13,288.16 = 4,920.13/x
  3. Step 3: Cross multiply
    8,867.12x = 13,288.16 × 4,920.13
  4. Step 4: Simplify right side
    8,867.12x = 65,379,474.66
  5. Step 5: Solve for x
    x = 65,379,474.66/8,867.12
  6. Step 6: Final answer
    x = 7,373.25

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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.