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Finding the Fourth Proportional to 13,860.43, 20,793.68 and 7,931.23

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Solution

The fourth proportional to 13,860.43, 20,793.68 and 7,931.23 is: 11,898.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,860.43 : 20,793.68 = 7,931.23 : x
  2. Step 2: Convert to fraction form
    13,860.43/20,793.68 = 7,931.23/x
  3. Step 3: Cross multiply
    13,860.43x = 20,793.68 × 7,931.23
  4. Step 4: Simplify right side
    13,860.43x = 164,919,458.63
  5. Step 5: Solve for x
    x = 164,919,458.63/13,860.43
  6. Step 6: Final answer
    x = 11,898.58

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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.