Home / 18,515.88-27,779.58-5,370.12

Finding the Fourth Proportional to 18,515.88, 27,779.58 and 5,370.12

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Solution

The fourth proportional to 18,515.88, 27,779.58 and 5,370.12 is: 8,056.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,515.88 : 27,779.58 = 5,370.12 : x
  2. Step 2: Convert to fraction form
    18,515.88/27,779.58 = 5,370.12/x
  3. Step 3: Cross multiply
    18,515.88x = 27,779.58 × 5,370.12
  4. Step 4: Simplify right side
    18,515.88x = 149,179,678.15
  5. Step 5: Solve for x
    x = 149,179,678.15/18,515.88
  6. Step 6: Final answer
    x = 8,056.85

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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.