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Finding the Fourth Proportional to 20,993.88, 28,970.62 and 12,034.96

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Solution

The fourth proportional to 20,993.88, 28,970.62 and 12,034.96 is: 16,607.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,993.88 : 28,970.62 = 12,034.96 : x
  2. Step 2: Convert to fraction form
    20,993.88/28,970.62 = 12,034.96/x
  3. Step 3: Cross multiply
    20,993.88x = 28,970.62 × 12,034.96
  4. Step 4: Simplify right side
    20,993.88x = 348,660,252.88
  5. Step 5: Solve for x
    x = 348,660,252.88/20,993.88
  6. Step 6: Final answer
    x = 16,607.71

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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.