Home / 20,981.16-28,957.88-12,028.73

Finding the Fourth Proportional to 20,981.16, 28,957.88 and 12,028.73

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Solution

The fourth proportional to 20,981.16, 28,957.88 and 12,028.73 is: 16,601.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,981.16 : 28,957.88 = 12,028.73 : x
  2. Step 2: Convert to fraction form
    20,981.16/28,957.88 = 12,028.73/x
  3. Step 3: Cross multiply
    20,981.16x = 28,957.88 × 12,028.73
  4. Step 4: Simplify right side
    20,981.16x = 348,326,405.17
  5. Step 5: Solve for x
    x = 348,326,405.17/20,981.16
  6. Step 6: Final answer
    x = 16,601.87

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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.