Home / 27,720.82-38,249.06-15,781.02

Finding the Fourth Proportional to 27,720.82, 38,249.06 and 15,781.02

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Solution

The fourth proportional to 27,720.82, 38,249.06 and 15,781.02 is: 21,774.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,720.82 : 38,249.06 = 15,781.02 : x
  2. Step 2: Convert to fraction form
    27,720.82/38,249.06 = 15,781.02/x
  3. Step 3: Cross multiply
    27,720.82x = 38,249.06 × 15,781.02
  4. Step 4: Simplify right side
    27,720.82x = 603,609,180.84
  5. Step 5: Solve for x
    x = 603,609,180.84/27,720.82
  6. Step 6: Final answer
    x = 21,774.58

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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.