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Finding the Fourth Proportional to 22,321.47, 30,811.22 and 15,621.09

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Solution

The fourth proportional to 22,321.47, 30,811.22 and 15,621.09 is: 21,562.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,321.47 : 30,811.22 = 15,621.09 : x
  2. Step 2: Convert to fraction form
    22,321.47/30,811.22 = 15,621.09/x
  3. Step 3: Cross multiply
    22,321.47x = 30,811.22 × 15,621.09
  4. Step 4: Simplify right side
    22,321.47x = 481,304,762.52
  5. Step 5: Solve for x
    x = 481,304,762.52/22,321.47
  6. Step 6: Final answer
    x = 21,562.41

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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.