Home / 27,660.78-38,171.30-15,085.53

Finding the Fourth Proportional to 27,660.78, 38,171.30 and 15,085.53

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Solution

The fourth proportional to 27,660.78, 38,171.30 and 15,085.53 is: 20,817.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,660.78 : 38,171.30 = 15,085.53 : x
  2. Step 2: Convert to fraction form
    27,660.78/38,171.30 = 15,085.53/x
  3. Step 3: Cross multiply
    27,660.78x = 38,171.30 × 15,085.53
  4. Step 4: Simplify right side
    27,660.78x = 575,834,215.86
  5. Step 5: Solve for x
    x = 575,834,215.86/27,660.78
  6. Step 6: Final answer
    x = 20,817.71

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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.