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Finding the Fourth Proportional to 28,504.64, 42,757.92 and 7,728.64

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Solution

The fourth proportional to 28,504.64, 42,757.92 and 7,728.64 is: 11,593.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,504.64 : 42,757.92 = 7,728.64 : x
  2. Step 2: Convert to fraction form
    28,504.64/42,757.92 = 7,728.64/x
  3. Step 3: Cross multiply
    28,504.64x = 42,757.92 × 7,728.64
  4. Step 4: Simplify right side
    28,504.64x = 330,460,570.83
  5. Step 5: Solve for x
    x = 330,460,570.83/28,504.64
  6. Step 6: Final answer
    x = 11,593.22

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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.