Home / 20,838.90-31,257.26-5,256.66

Finding the Fourth Proportional to 20,838.90, 31,257.26 and 5,256.66

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Solution

The fourth proportional to 20,838.90, 31,257.26 and 5,256.66 is: 7,884.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,838.90 : 31,257.26 = 5,256.66 : x
  2. Step 2: Convert to fraction form
    20,838.90/31,257.26 = 5,256.66/x
  3. Step 3: Cross multiply
    20,838.90x = 31,257.26 × 5,256.66
  4. Step 4: Simplify right side
    20,838.90x = 164,308,788.35
  5. Step 5: Solve for x
    x = 164,308,788.35/20,838.90
  6. Step 6: Final answer
    x = 7,884.72

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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.