Home / 11,161.26-15,402.78-6,689.70

Finding the Fourth Proportional to 11,161.26, 15,402.78 and 6,689.70

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Solution

The fourth proportional to 11,161.26, 15,402.78 and 6,689.70 is: 9,231.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,161.26 : 15,402.78 = 6,689.70 : x
  2. Step 2: Convert to fraction form
    11,161.26/15,402.78 = 6,689.70/x
  3. Step 3: Cross multiply
    11,161.26x = 15,402.78 × 6,689.70
  4. Step 4: Simplify right side
    11,161.26x = 103,039,977.37
  5. Step 5: Solve for x
    x = 103,039,977.37/11,161.26
  6. Step 6: Final answer
    x = 9,231.93

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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.