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Finding the Fourth Proportional to 28,356.13, 42,529.02 and 8,361.48

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Solution

The fourth proportional to 28,356.13, 42,529.02 and 8,361.48 is: 12,540.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,356.13 : 42,529.02 = 8,361.48 : x
  2. Step 2: Convert to fraction form
    28,356.13/42,529.02 = 8,361.48/x
  3. Step 3: Cross multiply
    28,356.13x = 42,529.02 × 8,361.48
  4. Step 4: Simplify right side
    28,356.13x = 355,605,509.60
  5. Step 5: Solve for x
    x = 355,605,509.60/28,356.13
  6. Step 6: Final answer
    x = 12,540.69

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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.