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Finding the Fourth Proportional to 18,865.92, 28,304.54 and 7,615.47

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Solution

The fourth proportional to 18,865.92, 28,304.54 and 7,615.47 is: 11,425.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,865.92 : 28,304.54 = 7,615.47 : x
  2. Step 2: Convert to fraction form
    18,865.92/28,304.54 = 7,615.47/x
  3. Step 3: Cross multiply
    18,865.92x = 28,304.54 × 7,615.47
  4. Step 4: Simplify right side
    18,865.92x = 215,552,375.23
  5. Step 5: Solve for x
    x = 215,552,375.23/18,865.92
  6. Step 6: Final answer
    x = 11,425.49

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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.