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Finding the Fourth Proportional to 28,703.84, 43,060.56 and 8,978.48

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Solution

The fourth proportional to 28,703.84, 43,060.56 and 8,978.48 is: 13,469.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,703.84 : 43,060.56 = 8,978.48 : x
  2. Step 2: Convert to fraction form
    28,703.84/43,060.56 = 8,978.48/x
  3. Step 3: Cross multiply
    28,703.84x = 43,060.56 × 8,978.48
  4. Step 4: Simplify right side
    28,703.84x = 386,618,376.75
  5. Step 5: Solve for x
    x = 386,618,376.75/28,703.84
  6. Step 6: Final answer
    x = 13,469.22

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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.