Home / 20,156.67-27,828.66-12,989.12

Finding the Fourth Proportional to 20,156.67, 27,828.66 and 12,989.12

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Solution

The fourth proportional to 20,156.67, 27,828.66 and 12,989.12 is: 17,933.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,156.67 : 27,828.66 = 12,989.12 : x
  2. Step 2: Convert to fraction form
    20,156.67/27,828.66 = 12,989.12/x
  3. Step 3: Cross multiply
    20,156.67x = 27,828.66 × 12,989.12
  4. Step 4: Simplify right side
    20,156.67x = 361,469,665.04
  5. Step 5: Solve for x
    x = 361,469,665.04/20,156.67
  6. Step 6: Final answer
    x = 17,933.01

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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.