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Finding the Fourth Proportional to 18,668.88, 28,008.80 and 5,521.60

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Solution

The fourth proportional to 18,668.88, 28,008.80 and 5,521.60 is: 8,284.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,668.88 : 28,008.80 = 5,521.60 : x
  2. Step 2: Convert to fraction form
    18,668.88/28,008.80 = 5,521.60/x
  3. Step 3: Cross multiply
    18,668.88x = 28,008.80 × 5,521.60
  4. Step 4: Simplify right side
    18,668.88x = 154,653,390.08
  5. Step 5: Solve for x
    x = 154,653,390.08/18,668.88
  6. Step 6: Final answer
    x = 8,284.02

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1.5x scale

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.