Home / 21,079.32-31,634.57-9,986.03

Finding the Fourth Proportional to 21,079.32, 31,634.57 and 9,986.03

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Solution

The fourth proportional to 21,079.32, 31,634.57 and 9,986.03 is: 14,986.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,079.32 : 31,634.57 = 9,986.03 : x
  2. Step 2: Convert to fraction form
    21,079.32/31,634.57 = 9,986.03/x
  3. Step 3: Cross multiply
    21,079.32x = 31,634.57 × 9,986.03
  4. Step 4: Simplify right side
    21,079.32x = 315,903,765.06
  5. Step 5: Solve for x
    x = 315,903,765.06/21,079.32
  6. Step 6: Final answer
    x = 14,986.43

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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.