Home / 21,255.56-31,885.11-6,464.61

Finding the Fourth Proportional to 21,255.56, 31,885.11 and 6,464.61

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Solution

The fourth proportional to 21,255.56, 31,885.11 and 6,464.61 is: 9,697.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,255.56 : 31,885.11 = 6,464.61 : x
  2. Step 2: Convert to fraction form
    21,255.56/31,885.11 = 6,464.61/x
  3. Step 3: Cross multiply
    21,255.56x = 31,885.11 × 6,464.61
  4. Step 4: Simplify right side
    21,255.56x = 206,124,800.96
  5. Step 5: Solve for x
    x = 206,124,800.96/21,255.56
  6. Step 6: Final answer
    x = 9,697.45

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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.