Home / 21,170.08-31,752.42-7,127.92

Finding the Fourth Proportional to 21,170.08, 31,752.42 and 7,127.92

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Solution

The fourth proportional to 21,170.08, 31,752.42 and 7,127.92 is: 10,690.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,170.08 : 31,752.42 = 7,127.92 : x
  2. Step 2: Convert to fraction form
    21,170.08/31,752.42 = 7,127.92/x
  3. Step 3: Cross multiply
    21,170.08x = 31,752.42 × 7,127.92
  4. Step 4: Simplify right side
    21,170.08x = 226,328,709.57
  5. Step 5: Solve for x
    x = 226,328,709.57/21,170.08
  6. Step 6: Final answer
    x = 10,690.97

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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.