Home / 8,990.30-13,488.68-3,147.77

Finding the Fourth Proportional to 8,990.30, 13,488.68 and 3,147.77

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Solution

The fourth proportional to 8,990.30, 13,488.68 and 3,147.77 is: 4,722.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,990.30 : 13,488.68 = 3,147.77 : x
  2. Step 2: Convert to fraction form
    8,990.30/13,488.68 = 3,147.77/x
  3. Step 3: Cross multiply
    8,990.30x = 13,488.68 × 3,147.77
  4. Step 4: Simplify right side
    8,990.30x = 42,459,202.67
  5. Step 5: Solve for x
    x = 42,459,202.67/8,990.30
  6. Step 6: Final answer
    x = 4,722.78

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1.5x scale

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.