Home / 21,123.22-31,685.07-5,542.42

Finding the Fourth Proportional to 21,123.22, 31,685.07 and 5,542.42

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Solution

The fourth proportional to 21,123.22, 31,685.07 and 5,542.42 is: 8,313.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,123.22 : 31,685.07 = 5,542.42 : x
  2. Step 2: Convert to fraction form
    21,123.22/31,685.07 = 5,542.42/x
  3. Step 3: Cross multiply
    21,123.22x = 31,685.07 × 5,542.42
  4. Step 4: Simplify right side
    21,123.22x = 175,611,965.67
  5. Step 5: Solve for x
    x = 175,611,965.67/21,123.22
  6. Step 6: Final answer
    x = 8,313.69

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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.