Home / 18,668.20-28,005.35-5,521.90

Finding the Fourth Proportional to 18,668.20, 28,005.35 and 5,521.90

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Solution

The fourth proportional to 18,668.20, 28,005.35 and 5,521.90 is: 8,283.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,668.20 : 28,005.35 = 5,521.90 : x
  2. Step 2: Convert to fraction form
    18,668.20/28,005.35 = 5,521.90/x
  3. Step 3: Cross multiply
    18,668.20x = 28,005.35 × 5,521.90
  4. Step 4: Simplify right side
    18,668.20x = 154,642,742.17
  5. Step 5: Solve for x
    x = 154,642,742.17/18,668.20
  6. Step 6: Final answer
    x = 8,283.75

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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.