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Finding the Fourth Proportional to 13,900.61, 20,851.02 and 11,123.73

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Solution

The fourth proportional to 13,900.61, 20,851.02 and 11,123.73 is: 16,685.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,900.61 : 20,851.02 = 11,123.73 : x
  2. Step 2: Convert to fraction form
    13,900.61/20,851.02 = 11,123.73/x
  3. Step 3: Cross multiply
    13,900.61x = 20,851.02 × 11,123.73
  4. Step 4: Simplify right side
    13,900.61x = 231,941,116.70
  5. Step 5: Solve for x
    x = 231,941,116.70/13,900.61
  6. Step 6: Final answer
    x = 16,685.68

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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.