Home / 15,811.96-21,820.78-8,738.43

Finding the Fourth Proportional to 15,811.96, 21,820.78 and 8,738.43

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Solution

The fourth proportional to 15,811.96, 21,820.78 and 8,738.43 is: 12,059.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,811.96 : 21,820.78 = 8,738.43 : x
  2. Step 2: Convert to fraction form
    15,811.96/21,820.78 = 8,738.43/x
  3. Step 3: Cross multiply
    15,811.96x = 21,820.78 × 8,738.43
  4. Step 4: Simplify right side
    15,811.96x = 190,679,358.58
  5. Step 5: Solve for x
    x = 190,679,358.58/15,811.96
  6. Step 6: Final answer
    x = 12,059.19

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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.