Home / 27,811.72-38,388.22-15,881.56

Finding the Fourth Proportional to 27,811.72, 38,388.22 and 15,881.56

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Solution

The fourth proportional to 27,811.72, 38,388.22 and 15,881.56 is: 21,921.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,811.72 : 38,388.22 = 15,881.56 : x
  2. Step 2: Convert to fraction form
    27,811.72/38,388.22 = 15,881.56/x
  3. Step 3: Cross multiply
    27,811.72x = 38,388.22 × 15,881.56
  4. Step 4: Simplify right side
    27,811.72x = 609,664,819.22
  5. Step 5: Solve for x
    x = 609,664,819.22/27,811.72
  6. Step 6: Final answer
    x = 21,921.15

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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.