Home / 11,986.78-16,543.71-7,211.55

Finding the Fourth Proportional to 11,986.78, 16,543.71 and 7,211.55

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Solution

The fourth proportional to 11,986.78, 16,543.71 and 7,211.55 is: 9,953.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,986.78 : 16,543.71 = 7,211.55 : x
  2. Step 2: Convert to fraction form
    11,986.78/16,543.71 = 7,211.55/x
  3. Step 3: Cross multiply
    11,986.78x = 16,543.71 × 7,211.55
  4. Step 4: Simplify right side
    11,986.78x = 119,305,755.79
  5. Step 5: Solve for x
    x = 119,305,755.79/11,986.78
  6. Step 6: Final answer
    x = 9,953.11

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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.