Home / 21,261.80-31,893.90-6,471.20

Finding the Fourth Proportional to 21,261.80, 31,893.90 and 6,471.20

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Solution

The fourth proportional to 21,261.80, 31,893.90 and 6,471.20 is: 9,707.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,261.80 : 31,893.90 = 6,471.20 : x
  2. Step 2: Convert to fraction form
    21,261.80/31,893.90 = 6,471.20/x
  3. Step 3: Cross multiply
    21,261.80x = 31,893.90 × 6,471.20
  4. Step 4: Simplify right side
    21,261.80x = 206,391,805.68
  5. Step 5: Solve for x
    x = 206,391,805.68/21,261.80
  6. Step 6: Final answer
    x = 9,707.17

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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.