Home / 20,447.49-28,216.81-11,372.80

Finding the Fourth Proportional to 20,447.49, 28,216.81 and 11,372.80

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Solution

The fourth proportional to 20,447.49, 28,216.81 and 11,372.80 is: 15,694.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,447.49 : 28,216.81 = 11,372.80 : x
  2. Step 2: Convert to fraction form
    20,447.49/28,216.81 = 11,372.80/x
  3. Step 3: Cross multiply
    20,447.49x = 28,216.81 × 11,372.80
  4. Step 4: Simplify right side
    20,447.49x = 320,904,136.77
  5. Step 5: Solve for x
    x = 320,904,136.77/20,447.49
  6. Step 6: Final answer
    x = 15,694.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.