Home / 20,519.16-30,779.88-6,479.52

Finding the Fourth Proportional to 20,519.16, 30,779.88 and 6,479.52

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Solution

The fourth proportional to 20,519.16, 30,779.88 and 6,479.52 is: 9,719.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,519.16 : 30,779.88 = 6,479.52 : x
  2. Step 2: Convert to fraction form
    20,519.16/30,779.88 = 6,479.52/x
  3. Step 3: Cross multiply
    20,519.16x = 30,779.88 × 6,479.52
  4. Step 4: Simplify right side
    20,519.16x = 199,438,848.06
  5. Step 5: Solve for x
    x = 199,438,848.06/20,519.16
  6. Step 6: Final answer
    x = 9,719.64

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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.