Home / 12,508.43-18,781.32-7,857.86

Finding the Fourth Proportional to 12,508.43, 18,781.32 and 7,857.86

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Solution

The fourth proportional to 12,508.43, 18,781.32 and 7,857.86 is: 11,798.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,508.43 : 18,781.32 = 7,857.86 : x
  2. Step 2: Convert to fraction form
    12,508.43/18,781.32 = 7,857.86/x
  3. Step 3: Cross multiply
    12,508.43x = 18,781.32 × 7,857.86
  4. Step 4: Simplify right side
    12,508.43x = 147,580,889.27
  5. Step 5: Solve for x
    x = 147,580,889.27/12,508.43
  6. Step 6: Final answer
    x = 11,798.52

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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.