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Finding the Fourth Proportional to 16,985.22, 25,481.47 and 7,118.81

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Solution

The fourth proportional to 16,985.22, 25,481.47 and 7,118.81 is: 10,679.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,985.22 : 25,481.47 = 7,118.81 : x
  2. Step 2: Convert to fraction form
    16,985.22/25,481.47 = 7,118.81/x
  3. Step 3: Cross multiply
    16,985.22x = 25,481.47 × 7,118.81
  4. Step 4: Simplify right side
    16,985.22x = 181,397,743.45
  5. Step 5: Solve for x
    x = 181,397,743.45/16,985.22
  6. Step 6: Final answer
    x = 10,679.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.