Home / 21,028.88-31,515.30-9,938.52

Finding the Fourth Proportional to 21,028.88, 31,515.30 and 9,938.52

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Solution

The fourth proportional to 21,028.88, 31,515.30 and 9,938.52 is: 14,894.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,028.88 : 31,515.30 = 9,938.52 : x
  2. Step 2: Convert to fraction form
    21,028.88/31,515.30 = 9,938.52/x
  3. Step 3: Cross multiply
    21,028.88x = 31,515.30 × 9,938.52
  4. Step 4: Simplify right side
    21,028.88x = 313,215,439.36
  5. Step 5: Solve for x
    x = 313,215,439.36/21,028.88
  6. Step 6: Final answer
    x = 14,894.54

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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.