Home / 11,121.36-15,352.20-6,931.68

Finding the Fourth Proportional to 11,121.36, 15,352.20 and 6,931.68

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Solution

The fourth proportional to 11,121.36, 15,352.20 and 6,931.68 is: 9,568.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,121.36 : 15,352.20 = 6,931.68 : x
  2. Step 2: Convert to fraction form
    11,121.36/15,352.20 = 6,931.68/x
  3. Step 3: Cross multiply
    11,121.36x = 15,352.20 × 6,931.68
  4. Step 4: Simplify right side
    11,121.36x = 106,416,537.70
  5. Step 5: Solve for x
    x = 106,416,537.70/11,121.36
  6. Step 6: Final answer
    x = 9,568.66

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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.