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Finding the Fourth Proportional to 20,777.80, 31,093.80 and 14,216.80

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Solution

The fourth proportional to 20,777.80, 31,093.80 and 14,216.80 is: 21,275.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,777.80 : 31,093.80 = 14,216.80 : x
  2. Step 2: Convert to fraction form
    20,777.80/31,093.80 = 14,216.80/x
  3. Step 3: Cross multiply
    20,777.80x = 31,093.80 × 14,216.80
  4. Step 4: Simplify right side
    20,777.80x = 442,054,335.84
  5. Step 5: Solve for x
    x = 442,054,335.84/20,777.80
  6. Step 6: Final answer
    x = 21,275.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.