Home / 20,108.49-27,747.50-11,153.76

Finding the Fourth Proportional to 20,108.49, 27,747.50 and 11,153.76

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Solution

The fourth proportional to 20,108.49, 27,747.50 and 11,153.76 is: 15,390.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,108.49 : 27,747.50 = 11,153.76 : x
  2. Step 2: Convert to fraction form
    20,108.49/27,747.50 = 11,153.76/x
  3. Step 3: Cross multiply
    20,108.49x = 27,747.50 × 11,153.76
  4. Step 4: Simplify right side
    20,108.49x = 309,488,899.83
  5. Step 5: Solve for x
    x = 309,488,899.83/20,108.49
  6. Step 6: Final answer
    x = 15,390.96

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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.