Home / 45,415.28-68,105.64-20,774

Finding the Fourth Proportional to 45,415.28, 68,105.64 and 20,774

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Solution

The fourth proportional to 45,415.28, 68,105.64 and 20,774 is: 31,153.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,415.28 : 68,105.64 = 20,774 : x
  2. Step 2: Convert to fraction form
    45,415.28/68,105.64 = 20,774/x
  3. Step 3: Cross multiply
    45,415.28x = 68,105.64 × 20,774
  4. Step 4: Simplify right side
    45,415.28x = 1,414,826,565.36
  5. Step 5: Solve for x
    x = 1,414,826,565.36/45,415.28
  6. Step 6: Final answer
    x = 31,153.10

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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.