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Finding the Fourth Proportional to 22,458.66, 30,991.23 and 12,387.48

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Solution

The fourth proportional to 22,458.66, 30,991.23 and 12,387.48 is: 17,093.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,458.66 : 30,991.23 = 12,387.48 : x
  2. Step 2: Convert to fraction form
    22,458.66/30,991.23 = 12,387.48/x
  3. Step 3: Cross multiply
    22,458.66x = 30,991.23 × 12,387.48
  4. Step 4: Simplify right side
    22,458.66x = 383,903,241.80
  5. Step 5: Solve for x
    x = 383,903,241.80/22,458.66
  6. Step 6: Final answer
    x = 17,093.77

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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.