Home / 12,279.20-16,939-8,032.76

Finding the Fourth Proportional to 12,279.20, 16,939 and 8,032.76

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Solution

The fourth proportional to 12,279.20, 16,939 and 8,032.76 is: 11,081.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,279.20 : 16,939 = 8,032.76 : x
  2. Step 2: Convert to fraction form
    12,279.20/16,939 = 8,032.76/x
  3. Step 3: Cross multiply
    12,279.20x = 16,939 × 8,032.76
  4. Step 4: Simplify right side
    12,279.20x = 136,066,921.64
  5. Step 5: Solve for x
    x = 136,066,921.64/12,279.20
  6. Step 6: Final answer
    x = 11,081.09

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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.