Home / 22,209.90-30,648.81-12,138.24

Finding the Fourth Proportional to 22,209.90, 30,648.81 and 12,138.24

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Solution

The fourth proportional to 22,209.90, 30,648.81 and 12,138.24 is: 16,750.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,209.90 : 30,648.81 = 12,138.24 : x
  2. Step 2: Convert to fraction form
    22,209.90/30,648.81 = 12,138.24/x
  3. Step 3: Cross multiply
    22,209.90x = 30,648.81 × 12,138.24
  4. Step 4: Simplify right side
    22,209.90x = 372,022,611.49
  5. Step 5: Solve for x
    x = 372,022,611.49/22,209.90
  6. Step 6: Final answer
    x = 16,750.31

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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.