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Finding the Fourth Proportional to 28,847, 39,808.86 and 15,599

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Solution

The fourth proportional to 28,847, 39,808.86 and 15,599 is: 21,526.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,847 : 39,808.86 = 15,599 : x
  2. Step 2: Convert to fraction form
    28,847/39,808.86 = 15,599/x
  3. Step 3: Cross multiply
    28,847x = 39,808.86 × 15,599
  4. Step 4: Simplify right side
    28,847x = 620,978,407.14
  5. Step 5: Solve for x
    x = 620,978,407.14/28,847
  6. Step 6: Final answer
    x = 21,526.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.