Home / 21,265.63-31,910.19-8,782.75

Finding the Fourth Proportional to 21,265.63, 31,910.19 and 8,782.75

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Solution

The fourth proportional to 21,265.63, 31,910.19 and 8,782.75 is: 13,178.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,265.63 : 31,910.19 = 8,782.75 : x
  2. Step 2: Convert to fraction form
    21,265.63/31,910.19 = 8,782.75/x
  3. Step 3: Cross multiply
    21,265.63x = 31,910.19 × 8,782.75
  4. Step 4: Simplify right side
    21,265.63x = 280,259,243.18
  5. Step 5: Solve for x
    x = 280,259,243.18/21,265.63
  6. Step 6: Final answer
    x = 13,178.98

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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.