Home / 10,319.80-15,447.30-8,116.60

Finding the Fourth Proportional to 10,319.80, 15,447.30 and 8,116.60

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Solution

The fourth proportional to 10,319.80, 15,447.30 and 8,116.60 is: 12,149.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,319.80 : 15,447.30 = 8,116.60 : x
  2. Step 2: Convert to fraction form
    10,319.80/15,447.30 = 8,116.60/x
  3. Step 3: Cross multiply
    10,319.80x = 15,447.30 × 8,116.60
  4. Step 4: Simplify right side
    10,319.80x = 125,379,555.18
  5. Step 5: Solve for x
    x = 125,379,555.18/10,319.80
  6. Step 6: Final answer
    x = 12,149.42

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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.