Home / 10,991.14-15,167.78-5,955.40

Finding the Fourth Proportional to 10,991.14, 15,167.78 and 5,955.40

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Solution

The fourth proportional to 10,991.14, 15,167.78 and 5,955.40 is: 8,218.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,991.14 : 15,167.78 = 5,955.40 : x
  2. Step 2: Convert to fraction form
    10,991.14/15,167.78 = 5,955.40/x
  3. Step 3: Cross multiply
    10,991.14x = 15,167.78 × 5,955.40
  4. Step 4: Simplify right side
    10,991.14x = 90,330,197.01
  5. Step 5: Solve for x
    x = 90,330,197.01/10,991.14
  6. Step 6: Final answer
    x = 8,218.46

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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.