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Finding the Fourth Proportional to 12,551.76, 18,813.32 and 5,881.28

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Solution

The fourth proportional to 12,551.76, 18,813.32 and 5,881.28 is: 8,815.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,551.76 : 18,813.32 = 5,881.28 : x
  2. Step 2: Convert to fraction form
    12,551.76/18,813.32 = 5,881.28/x
  3. Step 3: Cross multiply
    12,551.76x = 18,813.32 × 5,881.28
  4. Step 4: Simplify right side
    12,551.76x = 110,646,402.65
  5. Step 5: Solve for x
    x = 110,646,402.65/12,551.76
  6. Step 6: Final answer
    x = 8,815.21

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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.