Home / 11,139.53-15,372.11-6,660.64

Finding the Fourth Proportional to 11,139.53, 15,372.11 and 6,660.64

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Solution

The fourth proportional to 11,139.53, 15,372.11 and 6,660.64 is: 9,191.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,139.53 : 15,372.11 = 6,660.64 : x
  2. Step 2: Convert to fraction form
    11,139.53/15,372.11 = 6,660.64/x
  3. Step 3: Cross multiply
    11,139.53x = 15,372.11 × 6,660.64
  4. Step 4: Simplify right side
    11,139.53x = 102,387,980.59
  5. Step 5: Solve for x
    x = 102,387,980.59/11,139.53
  6. Step 6: Final answer
    x = 9,191.41

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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.