Home / 20,981.94-28,955.16-12,029.64

Finding the Fourth Proportional to 20,981.94, 28,955.16 and 12,029.64

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Solution

The fourth proportional to 20,981.94, 28,955.16 and 12,029.64 is: 16,600.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,981.94 : 28,955.16 = 12,029.64 : x
  2. Step 2: Convert to fraction form
    20,981.94/28,955.16 = 12,029.64/x
  3. Step 3: Cross multiply
    20,981.94x = 28,955.16 × 12,029.64
  4. Step 4: Simplify right side
    20,981.94x = 348,320,150.94
  5. Step 5: Solve for x
    x = 348,320,150.94/20,981.94
  6. Step 6: Final answer
    x = 16,600.95

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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.