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Finding the Fourth Proportional to 12,394.68, 17,090.20 and 9,245.40

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Solution

The fourth proportional to 12,394.68, 17,090.20 and 9,245.40 is: 12,747.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,394.68 : 17,090.20 = 9,245.40 : x
  2. Step 2: Convert to fraction form
    12,394.68/17,090.20 = 9,245.40/x
  3. Step 3: Cross multiply
    12,394.68x = 17,090.20 × 9,245.40
  4. Step 4: Simplify right side
    12,394.68x = 158,005,649.63
  5. Step 5: Solve for x
    x = 158,005,649.63/12,394.68
  6. Step 6: Final answer
    x = 12,747.87

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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.