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Finding the Fourth Proportional to 18,763.14, 28,148.64 and 7,076.28

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Solution

The fourth proportional to 18,763.14, 28,148.64 and 7,076.28 is: 10,615.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,763.14 : 28,148.64 = 7,076.28 : x
  2. Step 2: Convert to fraction form
    18,763.14/28,148.64 = 7,076.28/x
  3. Step 3: Cross multiply
    18,763.14x = 28,148.64 × 7,076.28
  4. Step 4: Simplify right side
    18,763.14x = 199,187,658.26
  5. Step 5: Solve for x
    x = 199,187,658.26/18,763.14
  6. Step 6: Final answer
    x = 10,615.90

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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.