Home / 21,230.55-31,826.97-10,686.78

Finding the Fourth Proportional to 21,230.55, 31,826.97 and 10,686.78

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Solution

The fourth proportional to 21,230.55, 31,826.97 and 10,686.78 is: 16,020.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,230.55 : 31,826.97 = 10,686.78 : x
  2. Step 2: Convert to fraction form
    21,230.55/31,826.97 = 10,686.78/x
  3. Step 3: Cross multiply
    21,230.55x = 31,826.97 × 10,686.78
  4. Step 4: Simplify right side
    21,230.55x = 340,127,826.46
  5. Step 5: Solve for x
    x = 340,127,826.46/21,230.55
  6. Step 6: Final answer
    x = 16,020.68

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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.