Home / 20,974.08-31,461.12-5,391.72

Finding the Fourth Proportional to 20,974.08, 31,461.12 and 5,391.72

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Solution

The fourth proportional to 20,974.08, 31,461.12 and 5,391.72 is: 8,087.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,974.08 : 31,461.12 = 5,391.72 : x
  2. Step 2: Convert to fraction form
    20,974.08/31,461.12 = 5,391.72/x
  3. Step 3: Cross multiply
    20,974.08x = 31,461.12 × 5,391.72
  4. Step 4: Simplify right side
    20,974.08x = 169,629,549.93
  5. Step 5: Solve for x
    x = 169,629,549.93/20,974.08
  6. Step 6: Final answer
    x = 8,087.58

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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.