Home / 11,905.20-16,428.74-6,869.66

Finding the Fourth Proportional to 11,905.20, 16,428.74 and 6,869.66

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Solution

The fourth proportional to 11,905.20, 16,428.74 and 6,869.66 is: 9,479.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,905.20 : 16,428.74 = 6,869.66 : x
  2. Step 2: Convert to fraction form
    11,905.20/16,428.74 = 6,869.66/x
  3. Step 3: Cross multiply
    11,905.20x = 16,428.74 × 6,869.66
  4. Step 4: Simplify right side
    11,905.20x = 112,859,741.54
  5. Step 5: Solve for x
    x = 112,859,741.54/11,905.20
  6. Step 6: Final answer
    x = 9,479.87

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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.