Home / 12,431.08-17,155.46-7,716.84

Finding the Fourth Proportional to 12,431.08, 17,155.46 and 7,716.84

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Solution

The fourth proportional to 12,431.08, 17,155.46 and 7,716.84 is: 10,649.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,431.08 : 17,155.46 = 7,716.84 : x
  2. Step 2: Convert to fraction form
    12,431.08/17,155.46 = 7,716.84/x
  3. Step 3: Cross multiply
    12,431.08x = 17,155.46 × 7,716.84
  4. Step 4: Simplify right side
    12,431.08x = 132,385,939.95
  5. Step 5: Solve for x
    x = 132,385,939.95/12,431.08
  6. Step 6: Final answer
    x = 10,649.59

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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.