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Finding the Fourth Proportional to 28,507.86, 42,743.40 and 15,369.66

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Solution

The fourth proportional to 28,507.86, 42,743.40 and 15,369.66 is: 23,044.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,507.86 : 42,743.40 = 15,369.66 : x
  2. Step 2: Convert to fraction form
    28,507.86/42,743.40 = 15,369.66/x
  3. Step 3: Cross multiply
    28,507.86x = 42,743.40 × 15,369.66
  4. Step 4: Simplify right side
    28,507.86x = 656,951,525.24
  5. Step 5: Solve for x
    x = 656,951,525.24/28,507.86
  6. Step 6: Final answer
    x = 23,044.58

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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.