Home / 20,111.65-27,751.85-11,156.92

Finding the Fourth Proportional to 20,111.65, 27,751.85 and 11,156.92

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Solution

The fourth proportional to 20,111.65, 27,751.85 and 11,156.92 is: 15,395.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,111.65 : 27,751.85 = 11,156.92 : x
  2. Step 2: Convert to fraction form
    20,111.65/27,751.85 = 11,156.92/x
  3. Step 3: Cross multiply
    20,111.65x = 27,751.85 × 11,156.92
  4. Step 4: Simplify right side
    20,111.65x = 309,625,086.98
  5. Step 5: Solve for x
    x = 309,625,086.98/20,111.65
  6. Step 6: Final answer
    x = 15,395.31

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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.