Home / 12,145.20-16,749.24-7,955.76

Finding the Fourth Proportional to 12,145.20, 16,749.24 and 7,955.76

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Solution

The fourth proportional to 12,145.20, 16,749.24 and 7,955.76 is: 10,971.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,145.20 : 16,749.24 = 7,955.76 : x
  2. Step 2: Convert to fraction form
    12,145.20/16,749.24 = 7,955.76/x
  3. Step 3: Cross multiply
    12,145.20x = 16,749.24 × 7,955.76
  4. Step 4: Simplify right side
    12,145.20x = 133,252,933.62
  5. Step 5: Solve for x
    x = 133,252,933.62/12,145.20
  6. Step 6: Final answer
    x = 10,971.65

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Half scale
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Double scale
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Similar ratio
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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.