Home / 15,177.11-20,955.19-12,665.71

Finding the Fourth Proportional to 15,177.11, 20,955.19 and 12,665.71

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Solution

The fourth proportional to 15,177.11, 20,955.19 and 12,665.71 is: 17,487.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,177.11 : 20,955.19 = 12,665.71 : x
  2. Step 2: Convert to fraction form
    15,177.11/20,955.19 = 12,665.71/x
  3. Step 3: Cross multiply
    15,177.11x = 20,955.19 × 12,665.71
  4. Step 4: Simplify right side
    15,177.11x = 265,412,286.42
  5. Step 5: Solve for x
    x = 265,412,286.42/15,177.11
  6. Step 6: Final answer
    x = 17,487.68

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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.