Home / 20,914.76-31,375.80-6,870.89

Finding the Fourth Proportional to 20,914.76, 31,375.80 and 6,870.89

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Solution

The fourth proportional to 20,914.76, 31,375.80 and 6,870.89 is: 10,307.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,914.76 : 31,375.80 = 6,870.89 : x
  2. Step 2: Convert to fraction form
    20,914.76/31,375.80 = 6,870.89/x
  3. Step 3: Cross multiply
    20,914.76x = 31,375.80 × 6,870.89
  4. Step 4: Simplify right side
    20,914.76x = 215,579,748.90
  5. Step 5: Solve for x
    x = 215,579,748.90/20,914.76
  6. Step 6: Final answer
    x = 10,307.54

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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.