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Finding the Fourth Proportional to 28,141.96, 42,199.98 and 15,829.96

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Solution

The fourth proportional to 28,141.96, 42,199.98 and 15,829.96 is: 23,737.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,141.96 : 42,199.98 = 15,829.96 : x
  2. Step 2: Convert to fraction form
    28,141.96/42,199.98 = 15,829.96/x
  3. Step 3: Cross multiply
    28,141.96x = 42,199.98 × 15,829.96
  4. Step 4: Simplify right side
    28,141.96x = 668,023,995.40
  5. Step 5: Solve for x
    x = 668,023,995.40/28,141.96
  6. Step 6: Final answer
    x = 23,737.65

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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.