Home / 21,178.58-31,772.01-6,388.70

Finding the Fourth Proportional to 21,178.58, 31,772.01 and 6,388.70

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Solution

The fourth proportional to 21,178.58, 31,772.01 and 6,388.70 is: 9,584.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,178.58 : 31,772.01 = 6,388.70 : x
  2. Step 2: Convert to fraction form
    21,178.58/31,772.01 = 6,388.70/x
  3. Step 3: Cross multiply
    21,178.58x = 31,772.01 × 6,388.70
  4. Step 4: Simplify right side
    21,178.58x = 202,981,840.29
  5. Step 5: Solve for x
    x = 202,981,840.29/21,178.58
  6. Step 6: Final answer
    x = 9,584.30

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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.