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Finding the Fourth Proportional to 22,550.40, 31,132.80 and 13,600.80

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Solution

The fourth proportional to 22,550.40, 31,132.80 and 13,600.80 is: 18,777.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,550.40 : 31,132.80 = 13,600.80 : x
  2. Step 2: Convert to fraction form
    22,550.40/31,132.80 = 13,600.80/x
  3. Step 3: Cross multiply
    22,550.40x = 31,132.80 × 13,600.80
  4. Step 4: Simplify right side
    22,550.40x = 423,430,986.24
  5. Step 5: Solve for x
    x = 423,430,986.24/22,550.40
  6. Step 6: Final answer
    x = 18,777.09

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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.