Home / 11,728.60-16,181.45-6,689.18

Finding the Fourth Proportional to 11,728.60, 16,181.45 and 6,689.18

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Solution

The fourth proportional to 11,728.60, 16,181.45 and 6,689.18 is: 9,228.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,728.60 : 16,181.45 = 6,689.18 : x
  2. Step 2: Convert to fraction form
    11,728.60/16,181.45 = 6,689.18/x
  3. Step 3: Cross multiply
    11,728.60x = 16,181.45 × 6,689.18
  4. Step 4: Simplify right side
    11,728.60x = 108,240,631.71
  5. Step 5: Solve for x
    x = 108,240,631.71/11,728.60
  6. Step 6: Final answer
    x = 9,228.78

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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.