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Finding the Fourth Proportional to 20,956.66, 31,434.65 and 6,917.60

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Solution

The fourth proportional to 20,956.66, 31,434.65 and 6,917.60 is: 10,376.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,956.66 : 31,434.65 = 6,917.60 : x
  2. Step 2: Convert to fraction form
    20,956.66/31,434.65 = 6,917.60/x
  3. Step 3: Cross multiply
    20,956.66x = 31,434.65 × 6,917.60
  4. Step 4: Simplify right side
    20,956.66x = 217,452,404.78
  5. Step 5: Solve for x
    x = 217,452,404.78/20,956.66
  6. Step 6: Final answer
    x = 10,376.29

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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.