Home / 11,781.57-16,251.48-6,999.78

Finding the Fourth Proportional to 11,781.57, 16,251.48 and 6,999.78

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Solution

The fourth proportional to 11,781.57, 16,251.48 and 6,999.78 is: 9,655.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,781.57 : 16,251.48 = 6,999.78 : x
  2. Step 2: Convert to fraction form
    11,781.57/16,251.48 = 6,999.78/x
  3. Step 3: Cross multiply
    11,781.57x = 16,251.48 × 6,999.78
  4. Step 4: Simplify right side
    11,781.57x = 113,756,784.67
  5. Step 5: Solve for x
    x = 113,756,784.67/11,781.57
  6. Step 6: Final answer
    x = 9,655.49

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1.5x scale

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.