Home / 18,929.28-28,396.66-5,779.95

Finding the Fourth Proportional to 18,929.28, 28,396.66 and 5,779.95

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Solution

The fourth proportional to 18,929.28, 28,396.66 and 5,779.95 is: 8,670.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,929.28 : 28,396.66 = 5,779.95 : x
  2. Step 2: Convert to fraction form
    18,929.28/28,396.66 = 5,779.95/x
  3. Step 3: Cross multiply
    18,929.28x = 28,396.66 × 5,779.95
  4. Step 4: Simplify right side
    18,929.28x = 164,131,274.97
  5. Step 5: Solve for x
    x = 164,131,274.97/18,929.28
  6. Step 6: Final answer
    x = 8,670.76

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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.