Home / 27,717.18-38,251.47-15,781.56

Finding the Fourth Proportional to 27,717.18, 38,251.47 and 15,781.56

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Solution

The fourth proportional to 27,717.18, 38,251.47 and 15,781.56 is: 21,779.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,717.18 : 38,251.47 = 15,781.56 : x
  2. Step 2: Convert to fraction form
    27,717.18/38,251.47 = 15,781.56/x
  3. Step 3: Cross multiply
    27,717.18x = 38,251.47 × 15,781.56
  4. Step 4: Simplify right side
    27,717.18x = 603,667,868.89
  5. Step 5: Solve for x
    x = 603,667,868.89/27,717.18
  6. Step 6: Final answer
    x = 21,779.56

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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.