Home / 20,123.42-27,769.07-11,170.40

Finding the Fourth Proportional to 20,123.42, 27,769.07 and 11,170.40

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Solution

The fourth proportional to 20,123.42, 27,769.07 and 11,170.40 is: 15,414.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,123.42 : 27,769.07 = 11,170.40 : x
  2. Step 2: Convert to fraction form
    20,123.42/27,769.07 = 11,170.40/x
  3. Step 3: Cross multiply
    20,123.42x = 27,769.07 × 11,170.40
  4. Step 4: Simplify right side
    20,123.42x = 310,191,424.83
  5. Step 5: Solve for x
    x = 310,191,424.83/20,123.42
  6. Step 6: Final answer
    x = 15,414.45

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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.