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Finding the Fourth Proportional to 8,763.68, 13,140.32 and 2,918.72

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Solution

The fourth proportional to 8,763.68, 13,140.32 and 2,918.72 is: 4,376.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,763.68 : 13,140.32 = 2,918.72 : x
  2. Step 2: Convert to fraction form
    8,763.68/13,140.32 = 2,918.72/x
  3. Step 3: Cross multiply
    8,763.68x = 13,140.32 × 2,918.72
  4. Step 4: Simplify right side
    8,763.68x = 38,352,914.79
  5. Step 5: Solve for x
    x = 38,352,914.79/8,763.68
  6. Step 6: Final answer
    x = 4,376.35

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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.