Home / 27,719.82-38,243.75-15,780.12

Finding the Fourth Proportional to 27,719.82, 38,243.75 and 15,780.12

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Solution

The fourth proportional to 27,719.82, 38,243.75 and 15,780.12 is: 21,771.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,719.82 : 38,243.75 = 15,780.12 : x
  2. Step 2: Convert to fraction form
    27,719.82/38,243.75 = 15,780.12/x
  3. Step 3: Cross multiply
    27,719.82x = 38,243.75 × 15,780.12
  4. Step 4: Simplify right side
    27,719.82x = 603,490,741.94
  5. Step 5: Solve for x
    x = 603,490,741.94/27,719.82
  6. Step 6: Final answer
    x = 21,771.09

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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.