Home / 10,991.30-15,172.92-7,017.71

Finding the Fourth Proportional to 10,991.30, 15,172.92 and 7,017.71

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Solution

The fourth proportional to 10,991.30, 15,172.92 and 7,017.71 is: 9,687.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,991.30 : 15,172.92 = 7,017.71 : x
  2. Step 2: Convert to fraction form
    10,991.30/15,172.92 = 7,017.71/x
  3. Step 3: Cross multiply
    10,991.30x = 15,172.92 × 7,017.71
  4. Step 4: Simplify right side
    10,991.30x = 106,479,076.55
  5. Step 5: Solve for x
    x = 106,479,076.55/10,991.30
  6. Step 6: Final answer
    x = 9,687.58

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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.