Home / 20,138.40-27,792.32-12,180.96

Finding the Fourth Proportional to 20,138.40, 27,792.32 and 12,180.96

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Solution

The fourth proportional to 20,138.40, 27,792.32 and 12,180.96 is: 16,810.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,138.40 : 27,792.32 = 12,180.96 : x
  2. Step 2: Convert to fraction form
    20,138.40/27,792.32 = 12,180.96/x
  3. Step 3: Cross multiply
    20,138.40x = 27,792.32 × 12,180.96
  4. Step 4: Simplify right side
    20,138.40x = 338,537,138.23
  5. Step 5: Solve for x
    x = 338,537,138.23/20,138.40
  6. Step 6: Final answer
    x = 16,810.53

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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.