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Finding the Fourth Proportional to 20,147.95, 27,797.81 and 12,079.95

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Solution

The fourth proportional to 20,147.95, 27,797.81 and 12,079.95 is: 16,666.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,147.95 : 27,797.81 = 12,079.95 : x
  2. Step 2: Convert to fraction form
    20,147.95/27,797.81 = 12,079.95/x
  3. Step 3: Cross multiply
    20,147.95x = 27,797.81 × 12,079.95
  4. Step 4: Simplify right side
    20,147.95x = 335,795,955.52
  5. Step 5: Solve for x
    x = 335,795,955.52/20,147.95
  6. Step 6: Final answer
    x = 16,666.51

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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.