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Finding the Fourth Proportional to 28,770.75, 43,157.75 and 7,995.87

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Solution

The fourth proportional to 28,770.75, 43,157.75 and 7,995.87 is: 11,994.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,770.75 : 43,157.75 = 7,995.87 : x
  2. Step 2: Convert to fraction form
    28,770.75/43,157.75 = 7,995.87/x
  3. Step 3: Cross multiply
    28,770.75x = 43,157.75 × 7,995.87
  4. Step 4: Simplify right side
    28,770.75x = 345,083,718.51
  5. Step 5: Solve for x
    x = 345,083,718.51/28,770.75
  6. Step 6: Final answer
    x = 11,994.26

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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.