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Finding the Fourth Proportional to 6,987, 10,479.72 and 1,792.92

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Solution

The fourth proportional to 6,987, 10,479.72 and 1,792.92 is: 2,689.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,987 : 10,479.72 = 1,792.92 : x
  2. Step 2: Convert to fraction form
    6,987/10,479.72 = 1,792.92/x
  3. Step 3: Cross multiply
    6,987x = 10,479.72 × 1,792.92
  4. Step 4: Simplify right side
    6,987x = 18,789,299.58
  5. Step 5: Solve for x
    x = 18,789,299.58/6,987
  6. Step 6: Final answer
    x = 2,689.18

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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.