Home / 21,270.56-31,909.30-7,231.84

Finding the Fourth Proportional to 21,270.56, 31,909.30 and 7,231.84

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Solution

The fourth proportional to 21,270.56, 31,909.30 and 7,231.84 is: 10,848.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,270.56 : 31,909.30 = 7,231.84 : x
  2. Step 2: Convert to fraction form
    21,270.56/31,909.30 = 7,231.84/x
  3. Step 3: Cross multiply
    21,270.56x = 31,909.30 × 7,231.84
  4. Step 4: Simplify right side
    21,270.56x = 230,762,973.92
  5. Step 5: Solve for x
    x = 230,762,973.92/21,270.56
  6. Step 6: Final answer
    x = 10,848.94

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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.