Home / 21,277.89-31,904.28-8,783.91

Finding the Fourth Proportional to 21,277.89, 31,904.28 and 8,783.91

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Solution

The fourth proportional to 21,277.89, 31,904.28 and 8,783.91 is: 13,170.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,277.89 : 31,904.28 = 8,783.91 : x
  2. Step 2: Convert to fraction form
    21,277.89/31,904.28 = 8,783.91/x
  3. Step 3: Cross multiply
    21,277.89x = 31,904.28 × 8,783.91
  4. Step 4: Simplify right side
    21,277.89x = 280,244,324.13
  5. Step 5: Solve for x
    x = 280,244,324.13/21,277.89
  6. Step 6: Final answer
    x = 13,170.68

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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.