Home / 20,123.78-27,771.72-11,171.41

Finding the Fourth Proportional to 20,123.78, 27,771.72 and 11,171.41

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Solution

The fourth proportional to 20,123.78, 27,771.72 and 11,171.41 is: 15,417.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,123.78 : 27,771.72 = 11,171.41 : x
  2. Step 2: Convert to fraction form
    20,123.78/27,771.72 = 11,171.41/x
  3. Step 3: Cross multiply
    20,123.78x = 27,771.72 × 11,171.41
  4. Step 4: Simplify right side
    20,123.78x = 310,249,270.53
  5. Step 5: Solve for x
    x = 310,249,270.53/20,123.78
  6. Step 6: Final answer
    x = 15,417.05

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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.