Home / 8,990.90-13,487.28-3,147.92

Finding the Fourth Proportional to 8,990.90, 13,487.28 and 3,147.92

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Solution

The fourth proportional to 8,990.90, 13,487.28 and 3,147.92 is: 4,722.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,990.90 : 13,487.28 = 3,147.92 : x
  2. Step 2: Convert to fraction form
    8,990.90/13,487.28 = 3,147.92/x
  3. Step 3: Cross multiply
    8,990.90x = 13,487.28 × 3,147.92
  4. Step 4: Simplify right side
    8,990.90x = 42,456,878.46
  5. Step 5: Solve for x
    x = 42,456,878.46/8,990.90
  6. Step 6: Final answer
    x = 4,722.21

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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.