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Finding the Fourth Proportional to 20,993.46, 28,968.83 and 12,925.83

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Solution

The fourth proportional to 20,993.46, 28,968.83 and 12,925.83 is: 17,836.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,993.46 : 28,968.83 = 12,925.83 : x
  2. Step 2: Convert to fraction form
    20,993.46/28,968.83 = 12,925.83/x
  3. Step 3: Cross multiply
    20,993.46x = 28,968.83 × 12,925.83
  4. Step 4: Simplify right side
    20,993.46x = 374,446,264.35
  5. Step 5: Solve for x
    x = 374,446,264.35/20,993.46
  6. Step 6: Final answer
    x = 17,836.33

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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.