Home / 20,108.80-27,749.90-11,156.08

Finding the Fourth Proportional to 20,108.80, 27,749.90 and 11,156.08

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Solution

The fourth proportional to 20,108.80, 27,749.90 and 11,156.08 is: 15,395.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,108.80 : 27,749.90 = 11,156.08 : x
  2. Step 2: Convert to fraction form
    20,108.80/27,749.90 = 11,156.08/x
  3. Step 3: Cross multiply
    20,108.80x = 27,749.90 × 11,156.08
  4. Step 4: Simplify right side
    20,108.80x = 309,580,104.39
  5. Step 5: Solve for x
    x = 309,580,104.39/20,108.80
  6. Step 6: Final answer
    x = 15,395.26

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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.