Home / 20,140.80-27,798.75-11,191.38

Finding the Fourth Proportional to 20,140.80, 27,798.75 and 11,191.38

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Solution

The fourth proportional to 20,140.80, 27,798.75 and 11,191.38 is: 15,446.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,140.80 : 27,798.75 = 11,191.38 : x
  2. Step 2: Convert to fraction form
    20,140.80/27,798.75 = 11,191.38/x
  3. Step 3: Cross multiply
    20,140.80x = 27,798.75 × 11,191.38
  4. Step 4: Simplify right side
    20,140.80x = 311,106,374.78
  5. Step 5: Solve for x
    x = 311,106,374.78/20,140.80
  6. Step 6: Final answer
    x = 15,446.57

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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.