Home / 21,188.28-31,776.36-8,538

Finding the Fourth Proportional to 21,188.28, 31,776.36 and 8,538

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Solution

The fourth proportional to 21,188.28, 31,776.36 and 8,538 is: 12,804.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,188.28 : 31,776.36 = 8,538 : x
  2. Step 2: Convert to fraction form
    21,188.28/31,776.36 = 8,538/x
  3. Step 3: Cross multiply
    21,188.28x = 31,776.36 × 8,538
  4. Step 4: Simplify right side
    21,188.28x = 271,306,561.68
  5. Step 5: Solve for x
    x = 271,306,561.68/21,188.28
  6. Step 6: Final answer
    x = 12,804.56

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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.