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Finding the Fourth Proportional to 7,746, 10,689.68 and 4,209.21

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Solution

The fourth proportional to 7,746, 10,689.68 and 4,209.21 is: 5,808.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,746 : 10,689.68 = 4,209.21 : x
  2. Step 2: Convert to fraction form
    7,746/10,689.68 = 4,209.21/x
  3. Step 3: Cross multiply
    7,746x = 10,689.68 × 4,209.21
  4. Step 4: Simplify right side
    7,746x = 44,995,107.95
  5. Step 5: Solve for x
    x = 44,995,107.95/7,746
  6. Step 6: Final answer
    x = 5,808.82

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.