Home / 11,931.40-17,876.78-7,765.08

Finding the Fourth Proportional to 11,931.40, 17,876.78 and 7,765.08

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Solution

The fourth proportional to 11,931.40, 17,876.78 and 7,765.08 is: 11,634.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,931.40 : 17,876.78 = 7,765.08 : x
  2. Step 2: Convert to fraction form
    11,931.40/17,876.78 = 7,765.08/x
  3. Step 3: Cross multiply
    11,931.40x = 17,876.78 × 7,765.08
  4. Step 4: Simplify right side
    11,931.40x = 138,814,626.84
  5. Step 5: Solve for x
    x = 138,814,626.84/11,931.40
  6. Step 6: Final answer
    x = 11,634.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.