Home / 20,990.39-28,970.70-12,043.73

Finding the Fourth Proportional to 20,990.39, 28,970.70 and 12,043.73

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Solution

The fourth proportional to 20,990.39, 28,970.70 and 12,043.73 is: 16,622.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,990.39 : 28,970.70 = 12,043.73 : x
  2. Step 2: Convert to fraction form
    20,990.39/28,970.70 = 12,043.73/x
  3. Step 3: Cross multiply
    20,990.39x = 28,970.70 × 12,043.73
  4. Step 4: Simplify right side
    20,990.39x = 348,915,228.49
  5. Step 5: Solve for x
    x = 348,915,228.49/20,990.39
  6. Step 6: Final answer
    x = 16,622.62

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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.