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Finding the Fourth Proportional to 28,039.44, 42,059.31 and 8,318.16

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Solution

The fourth proportional to 28,039.44, 42,059.31 and 8,318.16 is: 12,477.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,039.44 : 42,059.31 = 8,318.16 : x
  2. Step 2: Convert to fraction form
    28,039.44/42,059.31 = 8,318.16/x
  3. Step 3: Cross multiply
    28,039.44x = 42,059.31 × 8,318.16
  4. Step 4: Simplify right side
    28,039.44x = 349,856,070.07
  5. Step 5: Solve for x
    x = 349,856,070.07/28,039.44
  6. Step 6: Final answer
    x = 12,477.28

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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.