Home / 20,859.32-31,289-5,276.94

Finding the Fourth Proportional to 20,859.32, 31,289 and 5,276.94

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Solution

The fourth proportional to 20,859.32, 31,289 and 5,276.94 is: 7,915.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,859.32 : 31,289 = 5,276.94 : x
  2. Step 2: Convert to fraction form
    20,859.32/31,289 = 5,276.94/x
  3. Step 3: Cross multiply
    20,859.32x = 31,289 × 5,276.94
  4. Step 4: Simplify right side
    20,859.32x = 165,110,175.66
  5. Step 5: Solve for x
    x = 165,110,175.66/20,859.32
  6. Step 6: Final answer
    x = 7,915.42

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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.