Home / 21,331.40-31,986.56-6,536.75

Finding the Fourth Proportional to 21,331.40, 31,986.56 and 6,536.75

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Solution

The fourth proportional to 21,331.40, 31,986.56 and 6,536.75 is: 9,801.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,331.40 : 31,986.56 = 6,536.75 : x
  2. Step 2: Convert to fraction form
    21,331.40/31,986.56 = 6,536.75/x
  3. Step 3: Cross multiply
    21,331.40x = 31,986.56 × 6,536.75
  4. Step 4: Simplify right side
    21,331.40x = 209,088,002.49
  5. Step 5: Solve for x
    x = 209,088,002.49/21,331.40
  6. Step 6: Final answer
    x = 9,801.89

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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.