Home / 8,689.08-11,990.19-4,912.59

Finding the Fourth Proportional to 8,689.08, 11,990.19 and 4,912.59

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Solution

The fourth proportional to 8,689.08, 11,990.19 and 4,912.59 is: 6,778.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,689.08 : 11,990.19 = 4,912.59 : x
  2. Step 2: Convert to fraction form
    8,689.08/11,990.19 = 4,912.59/x
  3. Step 3: Cross multiply
    8,689.08x = 11,990.19 × 4,912.59
  4. Step 4: Simplify right side
    8,689.08x = 58,902,887.49
  5. Step 5: Solve for x
    x = 58,902,887.49/8,689.08
  6. Step 6: Final answer
    x = 6,778.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.