Home / 18,420.12-27,607.07-7,877.75

Finding the Fourth Proportional to 18,420.12, 27,607.07 and 7,877.75

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Solution

The fourth proportional to 18,420.12, 27,607.07 and 7,877.75 is: 11,806.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,420.12 : 27,607.07 = 7,877.75 : x
  2. Step 2: Convert to fraction form
    18,420.12/27,607.07 = 7,877.75/x
  3. Step 3: Cross multiply
    18,420.12x = 27,607.07 × 7,877.75
  4. Step 4: Simplify right side
    18,420.12x = 217,481,418.27
  5. Step 5: Solve for x
    x = 217,481,418.27/18,420.12
  6. Step 6: Final answer
    x = 11,806.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.