Home / 15,171.60-20,934.26-8,455.76

Finding the Fourth Proportional to 15,171.60, 20,934.26 and 8,455.76

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Solution

The fourth proportional to 15,171.60, 20,934.26 and 8,455.76 is: 11,667.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,171.60 : 20,934.26 = 8,455.76 : x
  2. Step 2: Convert to fraction form
    15,171.60/20,934.26 = 8,455.76/x
  3. Step 3: Cross multiply
    15,171.60x = 20,934.26 × 8,455.76
  4. Step 4: Simplify right side
    15,171.60x = 177,015,078.34
  5. Step 5: Solve for x
    x = 177,015,078.34/15,171.60
  6. Step 6: Final answer
    x = 11,667.53

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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.