Home / 10,991.20-15,167.83-5,955.56

Finding the Fourth Proportional to 10,991.20, 15,167.83 and 5,955.56

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Solution

The fourth proportional to 10,991.20, 15,167.83 and 5,955.56 is: 8,218.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,991.20 : 15,167.83 = 5,955.56 : x
  2. Step 2: Convert to fraction form
    10,991.20/15,167.83 = 5,955.56/x
  3. Step 3: Cross multiply
    10,991.20x = 15,167.83 × 5,955.56
  4. Step 4: Simplify right side
    10,991.20x = 90,332,883.71
  5. Step 5: Solve for x
    x = 90,332,883.71/10,991.20
  6. Step 6: Final answer
    x = 8,218.66

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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.