Home / 20,502.78-30,694.32-15,591.66

Finding the Fourth Proportional to 20,502.78, 30,694.32 and 15,591.66

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Solution

The fourth proportional to 20,502.78, 30,694.32 and 15,591.66 is: 23,341.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,502.78 : 30,694.32 = 15,591.66 : x
  2. Step 2: Convert to fraction form
    20,502.78/30,694.32 = 15,591.66/x
  3. Step 3: Cross multiply
    20,502.78x = 30,694.32 × 15,591.66
  4. Step 4: Simplify right side
    20,502.78x = 478,575,401.37
  5. Step 5: Solve for x
    x = 478,575,401.37/20,502.78
  6. Step 6: Final answer
    x = 23,341.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.