Home / 11,141.55-15,380.09-7,508.40

Finding the Fourth Proportional to 11,141.55, 15,380.09 and 7,508.40

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Solution

The fourth proportional to 11,141.55, 15,380.09 and 7,508.40 is: 10,364.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,141.55 : 15,380.09 = 7,508.40 : x
  2. Step 2: Convert to fraction form
    11,141.55/15,380.09 = 7,508.40/x
  3. Step 3: Cross multiply
    11,141.55x = 15,380.09 × 7,508.40
  4. Step 4: Simplify right side
    11,141.55x = 115,479,830.21
  5. Step 5: Solve for x
    x = 115,479,830.21/11,141.55
  6. Step 6: Final answer
    x = 10,364.79

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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.