Home / 11,681.72-16,120.08-6,645.24

Finding the Fourth Proportional to 11,681.72, 16,120.08 and 6,645.24

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Solution

The fourth proportional to 11,681.72, 16,120.08 and 6,645.24 is: 9,170.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,681.72 : 16,120.08 = 6,645.24 : x
  2. Step 2: Convert to fraction form
    11,681.72/16,120.08 = 6,645.24/x
  3. Step 3: Cross multiply
    11,681.72x = 16,120.08 × 6,645.24
  4. Step 4: Simplify right side
    11,681.72x = 107,121,800.42
  5. Step 5: Solve for x
    x = 107,121,800.42/11,681.72
  6. Step 6: Final answer
    x = 9,170.04

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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.