Home / 21,175.76-31,764.60-7,325.84

Finding the Fourth Proportional to 21,175.76, 31,764.60 and 7,325.84

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Solution

The fourth proportional to 21,175.76, 31,764.60 and 7,325.84 is: 10,989.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,175.76 : 31,764.60 = 7,325.84 : x
  2. Step 2: Convert to fraction form
    21,175.76/31,764.60 = 7,325.84/x
  3. Step 3: Cross multiply
    21,175.76x = 31,764.60 × 7,325.84
  4. Step 4: Simplify right side
    21,175.76x = 232,702,377.26
  5. Step 5: Solve for x
    x = 232,702,377.26/21,175.76
  6. Step 6: Final answer
    x = 10,989.09

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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.