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Finding the Fourth Proportional to 22,374.90, 30,877.20 and 12,816.90

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Solution

The fourth proportional to 22,374.90, 30,877.20 and 12,816.90 is: 17,687.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,374.90 : 30,877.20 = 12,816.90 : x
  2. Step 2: Convert to fraction form
    22,374.90/30,877.20 = 12,816.90/x
  3. Step 3: Cross multiply
    22,374.90x = 30,877.20 × 12,816.90
  4. Step 4: Simplify right side
    22,374.90x = 395,749,984.68
  5. Step 5: Solve for x
    x = 395,749,984.68/22,374.90
  6. Step 6: Final answer
    x = 17,687.23

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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.