Home / 11,691.68-16,128.33-7,909.79

Finding the Fourth Proportional to 11,691.68, 16,128.33 and 7,909.79

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Solution

The fourth proportional to 11,691.68, 16,128.33 and 7,909.79 is: 10,911.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,691.68 : 16,128.33 = 7,909.79 : x
  2. Step 2: Convert to fraction form
    11,691.68/16,128.33 = 7,909.79/x
  3. Step 3: Cross multiply
    11,691.68x = 16,128.33 × 7,909.79
  4. Step 4: Simplify right side
    11,691.68x = 127,571,703.35
  5. Step 5: Solve for x
    x = 127,571,703.35/11,691.68
  6. Step 6: Final answer
    x = 10,911.32

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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.