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Finding the Fourth Proportional to 8,990.40, 13,479.77 and 4,310.30

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Solution

The fourth proportional to 8,990.40, 13,479.77 and 4,310.30 is: 6,462.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,990.40 : 13,479.77 = 4,310.30 : x
  2. Step 2: Convert to fraction form
    8,990.40/13,479.77 = 4,310.30/x
  3. Step 3: Cross multiply
    8,990.40x = 13,479.77 × 4,310.30
  4. Step 4: Simplify right side
    8,990.40x = 58,101,763.68
  5. Step 5: Solve for x
    x = 58,101,763.68/8,990.40
  6. Step 6: Final answer
    x = 6,462.65

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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.