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Finding the Fourth Proportional to 18,751.50, 28,127.25 and 7,664.22

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Solution

The fourth proportional to 18,751.50, 28,127.25 and 7,664.22 is: 11,496.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,751.50 : 28,127.25 = 7,664.22 : x
  2. Step 2: Convert to fraction form
    18,751.50/28,127.25 = 7,664.22/x
  3. Step 3: Cross multiply
    18,751.50x = 28,127.25 × 7,664.22
  4. Step 4: Simplify right side
    18,751.50x = 215,573,432.00
  5. Step 5: Solve for x
    x = 215,573,432.00/18,751.50
  6. Step 6: Final answer
    x = 11,496.33

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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.