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Finding the Fourth Proportional to 56,997.72, 85,486.59 and 15,435

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Solution

The fourth proportional to 56,997.72, 85,486.59 and 15,435 is: 23,149.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,997.72 : 85,486.59 = 15,435 : x
  2. Step 2: Convert to fraction form
    56,997.72/85,486.59 = 15,435/x
  3. Step 3: Cross multiply
    56,997.72x = 85,486.59 × 15,435
  4. Step 4: Simplify right side
    56,997.72x = 1,319,485,516.65
  5. Step 5: Solve for x
    x = 1,319,485,516.65/56,997.72
  6. Step 6: Final answer
    x = 23,149.79

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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.