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Finding the Fourth Proportional to 12,353.21, 17,047.31 and 6,687.81

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Solution

The fourth proportional to 12,353.21, 17,047.31 and 6,687.81 is: 9,229.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,353.21 : 17,047.31 = 6,687.81 : x
  2. Step 2: Convert to fraction form
    12,353.21/17,047.31 = 6,687.81/x
  3. Step 3: Cross multiply
    12,353.21x = 17,047.31 × 6,687.81
  4. Step 4: Simplify right side
    12,353.21x = 114,009,193.90
  5. Step 5: Solve for x
    x = 114,009,193.90/12,353.21
  6. Step 6: Final answer
    x = 9,229.12

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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.