Home / 13,721.32-20,582.80-3,861.36

Finding the Fourth Proportional to 13,721.32, 20,582.80 and 3,861.36

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Solution

The fourth proportional to 13,721.32, 20,582.80 and 3,861.36 is: 5,792.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,721.32 : 20,582.80 = 3,861.36 : x
  2. Step 2: Convert to fraction form
    13,721.32/20,582.80 = 3,861.36/x
  3. Step 3: Cross multiply
    13,721.32x = 20,582.80 × 3,861.36
  4. Step 4: Simplify right side
    13,721.32x = 79,477,600.61
  5. Step 5: Solve for x
    x = 79,477,600.61/13,721.32
  6. Step 6: Final answer
    x = 5,792.27

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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.