Home / 21,022.12-31,529.22-7,871.68

Finding the Fourth Proportional to 21,022.12, 31,529.22 and 7,871.68

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Solution

The fourth proportional to 21,022.12, 31,529.22 and 7,871.68 is: 11,806.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,022.12 : 31,529.22 = 7,871.68 : x
  2. Step 2: Convert to fraction form
    21,022.12/31,529.22 = 7,871.68/x
  3. Step 3: Cross multiply
    21,022.12x = 31,529.22 × 7,871.68
  4. Step 4: Simplify right side
    21,022.12x = 248,187,930.49
  5. Step 5: Solve for x
    x = 248,187,930.49/21,022.12
  6. Step 6: Final answer
    x = 11,806.04

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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.