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Finding the Fourth Proportional to 11,715.44, 16,168.80 and 6,681.44

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Solution

The fourth proportional to 11,715.44, 16,168.80 and 6,681.44 is: 9,221.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,715.44 : 16,168.80 = 6,681.44 : x
  2. Step 2: Convert to fraction form
    11,715.44/16,168.80 = 6,681.44/x
  3. Step 3: Cross multiply
    11,715.44x = 16,168.80 × 6,681.44
  4. Step 4: Simplify right side
    11,715.44x = 108,030,867.07
  5. Step 5: Solve for x
    x = 108,030,867.07/11,715.44
  6. Step 6: Final answer
    x = 9,221.24

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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.