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Finding the Fourth Proportional to 12,393.21, 17,101.58 and 7,086.99

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Solution

The fourth proportional to 12,393.21, 17,101.58 and 7,086.99 is: 9,779.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,393.21 : 17,101.58 = 7,086.99 : x
  2. Step 2: Convert to fraction form
    12,393.21/17,101.58 = 7,086.99/x
  3. Step 3: Cross multiply
    12,393.21x = 17,101.58 × 7,086.99
  4. Step 4: Simplify right side
    12,393.21x = 121,198,691.01
  5. Step 5: Solve for x
    x = 121,198,691.01/12,393.21
  6. Step 6: Final answer
    x = 9,779.44

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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.