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Finding the Fourth Proportional to 20,275.44, 27,978.95 and 12,108.26

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Solution

The fourth proportional to 20,275.44, 27,978.95 and 12,108.26 is: 16,708.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,275.44 : 27,978.95 = 12,108.26 : x
  2. Step 2: Convert to fraction form
    20,275.44/27,978.95 = 12,108.26/x
  3. Step 3: Cross multiply
    20,275.44x = 27,978.95 × 12,108.26
  4. Step 4: Simplify right side
    20,275.44x = 338,776,340.59
  5. Step 5: Solve for x
    x = 338,776,340.59/20,275.44
  6. Step 6: Final answer
    x = 16,708.70

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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.