Home / 20,729.50-31,094.34-6,878.50

Finding the Fourth Proportional to 20,729.50, 31,094.34 and 6,878.50

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Solution

The fourth proportional to 20,729.50, 31,094.34 and 6,878.50 is: 10,317.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,729.50 : 31,094.34 = 6,878.50 : x
  2. Step 2: Convert to fraction form
    20,729.50/31,094.34 = 6,878.50/x
  3. Step 3: Cross multiply
    20,729.50x = 31,094.34 × 6,878.50
  4. Step 4: Simplify right side
    20,729.50x = 213,882,417.69
  5. Step 5: Solve for x
    x = 213,882,417.69/20,729.50
  6. Step 6: Final answer
    x = 10,317.78

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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.