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Finding the Fourth Proportional to 11,860.72, 17,785.28 and 6,931.60

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Solution

The fourth proportional to 11,860.72, 17,785.28 and 6,931.60 is: 10,394.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,860.72 : 17,785.28 = 6,931.60 : x
  2. Step 2: Convert to fraction form
    11,860.72/17,785.28 = 6,931.60/x
  3. Step 3: Cross multiply
    11,860.72x = 17,785.28 × 6,931.60
  4. Step 4: Simplify right side
    11,860.72x = 123,280,446.85
  5. Step 5: Solve for x
    x = 123,280,446.85/11,860.72
  6. Step 6: Final answer
    x = 10,394.01

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1.5x scale

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.