Home / 21,127.92-31,675.47-8,651.09

Finding the Fourth Proportional to 21,127.92, 31,675.47 and 8,651.09

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Solution

The fourth proportional to 21,127.92, 31,675.47 and 8,651.09 is: 12,969.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,127.92 : 31,675.47 = 8,651.09 : x
  2. Step 2: Convert to fraction form
    21,127.92/31,675.47 = 8,651.09/x
  3. Step 3: Cross multiply
    21,127.92x = 31,675.47 × 8,651.09
  4. Step 4: Simplify right side
    21,127.92x = 274,027,183.38
  5. Step 5: Solve for x
    x = 274,027,183.38/21,127.92
  6. Step 6: Final answer
    x = 12,969.91

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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.