Home / 20,777.20-31,165.80-18,530.80

Finding the Fourth Proportional to 20,777.20, 31,165.80 and 18,530.80

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Solution

The fourth proportional to 20,777.20, 31,165.80 and 18,530.80 is: 27,796.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,777.20 : 31,165.80 = 18,530.80 : x
  2. Step 2: Convert to fraction form
    20,777.20/31,165.80 = 18,530.80/x
  3. Step 3: Cross multiply
    20,777.20x = 31,165.80 × 18,530.80
  4. Step 4: Simplify right side
    20,777.20x = 577,527,206.64
  5. Step 5: Solve for x
    x = 577,527,206.64/20,777.20
  6. Step 6: Final answer
    x = 27,796.20

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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.