Home / 21,184.38-31,772.79-7,855.83

Finding the Fourth Proportional to 21,184.38, 31,772.79 and 7,855.83

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Solution

The fourth proportional to 21,184.38, 31,772.79 and 7,855.83 is: 11,782.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,184.38 : 31,772.79 = 7,855.83 : x
  2. Step 2: Convert to fraction form
    21,184.38/31,772.79 = 7,855.83/x
  3. Step 3: Cross multiply
    21,184.38x = 31,772.79 × 7,855.83
  4. Step 4: Simplify right side
    21,184.38x = 249,601,636.87
  5. Step 5: Solve for x
    x = 249,601,636.87/21,184.38
  6. Step 6: Final answer
    x = 11,782.34

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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.