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Finding the Fourth Proportional to 13,669.42, 20,504.13 and 9,781.42

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Solution

The fourth proportional to 13,669.42, 20,504.13 and 9,781.42 is: 14,672.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,669.42 : 20,504.13 = 9,781.42 : x
  2. Step 2: Convert to fraction form
    13,669.42/20,504.13 = 9,781.42/x
  3. Step 3: Cross multiply
    13,669.42x = 20,504.13 × 9,781.42
  4. Step 4: Simplify right side
    13,669.42x = 200,559,507.26
  5. Step 5: Solve for x
    x = 200,559,507.26/13,669.42
  6. Step 6: Final answer
    x = 14,672.13

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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.