Home / 12,139.68-16,757.04-8,158.56

Finding the Fourth Proportional to 12,139.68, 16,757.04 and 8,158.56

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Solution

The fourth proportional to 12,139.68, 16,757.04 and 8,158.56 is: 11,261.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,139.68 : 16,757.04 = 8,158.56 : x
  2. Step 2: Convert to fraction form
    12,139.68/16,757.04 = 8,158.56/x
  3. Step 3: Cross multiply
    12,139.68x = 16,757.04 × 8,158.56
  4. Step 4: Simplify right side
    12,139.68x = 136,713,316.26
  5. Step 5: Solve for x
    x = 136,713,316.26/12,139.68
  6. Step 6: Final answer
    x = 11,261.69

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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.