Home / 13,721.32-20,571-12,948.60

Finding the Fourth Proportional to 13,721.32, 20,571 and 12,948.60

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Solution

The fourth proportional to 13,721.32, 20,571 and 12,948.60 is: 19,412.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,721.32 : 20,571 = 12,948.60 : x
  2. Step 2: Convert to fraction form
    13,721.32/20,571 = 12,948.60/x
  3. Step 3: Cross multiply
    13,721.32x = 20,571 × 12,948.60
  4. Step 4: Simplify right side
    13,721.32x = 266,365,650.60
  5. Step 5: Solve for x
    x = 266,365,650.60/13,721.32
  6. Step 6: Final answer
    x = 19,412.54

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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.