Home / 21,877.11-30,189.38-13,491.99

Finding the Fourth Proportional to 21,877.11, 30,189.38 and 13,491.99

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Solution

The fourth proportional to 21,877.11, 30,189.38 and 13,491.99 is: 18,618.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,877.11 : 30,189.38 = 13,491.99 : x
  2. Step 2: Convert to fraction form
    21,877.11/30,189.38 = 13,491.99/x
  3. Step 3: Cross multiply
    21,877.11x = 30,189.38 × 13,491.99
  4. Step 4: Simplify right side
    21,877.11x = 407,314,745.61
  5. Step 5: Solve for x
    x = 407,314,745.61/21,877.11
  6. Step 6: Final answer
    x = 18,618.31

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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.