Home / 21,153.15-31,731.89-5,571.99

Finding the Fourth Proportional to 21,153.15, 31,731.89 and 5,571.99

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Solution

The fourth proportional to 21,153.15, 31,731.89 and 5,571.99 is: 8,358.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,153.15 : 31,731.89 = 5,571.99 : x
  2. Step 2: Convert to fraction form
    21,153.15/31,731.89 = 5,571.99/x
  3. Step 3: Cross multiply
    21,153.15x = 31,731.89 × 5,571.99
  4. Step 4: Simplify right side
    21,153.15x = 176,809,745.90
  5. Step 5: Solve for x
    x = 176,809,745.90/21,153.15
  6. Step 6: Final answer
    x = 8,358.55

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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.