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Finding the Fourth Proportional to 28,752.75, 43,129.13 and 7,976.25

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Solution

The fourth proportional to 28,752.75, 43,129.13 and 7,976.25 is: 11,964.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,752.75 : 43,129.13 = 7,976.25 : x
  2. Step 2: Convert to fraction form
    28,752.75/43,129.13 = 7,976.25/x
  3. Step 3: Cross multiply
    28,752.75x = 43,129.13 × 7,976.25
  4. Step 4: Simplify right side
    28,752.75x = 344,008,683.28
  5. Step 5: Solve for x
    x = 344,008,683.28/28,752.75
  6. Step 6: Final answer
    x = 11,964.38

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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.