Home / 11,681.12-16,119.43-6,645.76

Finding the Fourth Proportional to 11,681.12, 16,119.43 and 6,645.76

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Solution

The fourth proportional to 11,681.12, 16,119.43 and 6,645.76 is: 9,170.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,681.12 : 16,119.43 = 6,645.76 : x
  2. Step 2: Convert to fraction form
    11,681.12/16,119.43 = 6,645.76/x
  3. Step 3: Cross multiply
    11,681.12x = 16,119.43 × 6,645.76
  4. Step 4: Simplify right side
    11,681.12x = 107,125,863.12
  5. Step 5: Solve for x
    x = 107,125,863.12/11,681.12
  6. Step 6: Final answer
    x = 9,170.86

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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.