Home / 17,918.20-24,661.83-15,779.75

Finding the Fourth Proportional to 17,918.20, 24,661.83 and 15,779.75

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Solution

The fourth proportional to 17,918.20, 24,661.83 and 15,779.75 is: 21,718.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,918.20 : 24,661.83 = 15,779.75 : x
  2. Step 2: Convert to fraction form
    17,918.20/24,661.83 = 15,779.75/x
  3. Step 3: Cross multiply
    17,918.20x = 24,661.83 × 15,779.75
  4. Step 4: Simplify right side
    17,918.20x = 389,157,511.94
  5. Step 5: Solve for x
    x = 389,157,511.94/17,918.20
  6. Step 6: Final answer
    x = 21,718.56

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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.