Home / 20,644.42-28,474.80-12,691.03

Finding the Fourth Proportional to 20,644.42, 28,474.80 and 12,691.03

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Solution

The fourth proportional to 20,644.42, 28,474.80 and 12,691.03 is: 17,504.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,644.42 : 28,474.80 = 12,691.03 : x
  2. Step 2: Convert to fraction form
    20,644.42/28,474.80 = 12,691.03/x
  3. Step 3: Cross multiply
    20,644.42x = 28,474.80 × 12,691.03
  4. Step 4: Simplify right side
    20,644.42x = 361,374,541.04
  5. Step 5: Solve for x
    x = 361,374,541.04/20,644.42
  6. Step 6: Final answer
    x = 17,504.71

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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.