Home / 20,710.82-31,054.38-9,611.78

Finding the Fourth Proportional to 20,710.82, 31,054.38 and 9,611.78

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Solution

The fourth proportional to 20,710.82, 31,054.38 and 9,611.78 is: 14,412.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,710.82 : 31,054.38 = 9,611.78 : x
  2. Step 2: Convert to fraction form
    20,710.82/31,054.38 = 9,611.78/x
  3. Step 3: Cross multiply
    20,710.82x = 31,054.38 × 9,611.78
  4. Step 4: Simplify right side
    20,710.82x = 298,487,868.60
  5. Step 5: Solve for x
    x = 298,487,868.60/20,710.82
  6. Step 6: Final answer
    x = 14,412.17

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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.