Home / 21,519.92-32,405.72-18,779.42

Finding the Fourth Proportional to 21,519.92, 32,405.72 and 18,779.42

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Solution

The fourth proportional to 21,519.92, 32,405.72 and 18,779.42 is: 28,278.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,519.92 : 32,405.72 = 18,779.42 : x
  2. Step 2: Convert to fraction form
    21,519.92/32,405.72 = 18,779.42/x
  3. Step 3: Cross multiply
    21,519.92x = 32,405.72 × 18,779.42
  4. Step 4: Simplify right side
    21,519.92x = 608,560,626.28
  5. Step 5: Solve for x
    x = 608,560,626.28/21,519.92
  6. Step 6: Final answer
    x = 28,278.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.