Home / 20,156.91-27,816.56-11,204.20

Finding the Fourth Proportional to 20,156.91, 27,816.56 and 11,204.20

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Solution

The fourth proportional to 20,156.91, 27,816.56 and 11,204.20 is: 15,461.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,156.91 : 27,816.56 = 11,204.20 : x
  2. Step 2: Convert to fraction form
    20,156.91/27,816.56 = 11,204.20/x
  3. Step 3: Cross multiply
    20,156.91x = 27,816.56 × 11,204.20
  4. Step 4: Simplify right side
    20,156.91x = 311,662,301.55
  5. Step 5: Solve for x
    x = 311,662,301.55/20,156.91
  6. Step 6: Final answer
    x = 15,461.81

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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.