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Finding the Fourth Proportional to 28,490.53, 42,735.66 and 7,714.03

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Solution

The fourth proportional to 28,490.53, 42,735.66 and 7,714.03 is: 11,571.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,490.53 : 42,735.66 = 7,714.03 : x
  2. Step 2: Convert to fraction form
    28,490.53/42,735.66 = 7,714.03/x
  3. Step 3: Cross multiply
    28,490.53x = 42,735.66 × 7,714.03
  4. Step 4: Simplify right side
    28,490.53x = 329,664,163.31
  5. Step 5: Solve for x
    x = 329,664,163.31/28,490.53
  6. Step 6: Final answer
    x = 11,571.01

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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.