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Finding the Fourth Proportional to 18,865.71, 28,304.48 and 7,777.62

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Solution

The fourth proportional to 18,865.71, 28,304.48 and 7,777.62 is: 11,668.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,865.71 : 28,304.48 = 7,777.62 : x
  2. Step 2: Convert to fraction form
    18,865.71/28,304.48 = 7,777.62/x
  3. Step 3: Cross multiply
    18,865.71x = 28,304.48 × 7,777.62
  4. Step 4: Simplify right side
    18,865.71x = 220,141,348.22
  5. Step 5: Solve for x
    x = 220,141,348.22/18,865.71
  6. Step 6: Final answer
    x = 11,668.86

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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.