Home / 21,220.08-31,818.92-7,175.28

Finding the Fourth Proportional to 21,220.08, 31,818.92 and 7,175.28

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Solution

The fourth proportional to 21,220.08, 31,818.92 and 7,175.28 is: 10,759.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,220.08 : 31,818.92 = 7,175.28 : x
  2. Step 2: Convert to fraction form
    21,220.08/31,818.92 = 7,175.28/x
  3. Step 3: Cross multiply
    21,220.08x = 31,818.92 × 7,175.28
  4. Step 4: Simplify right side
    21,220.08x = 228,309,660.30
  5. Step 5: Solve for x
    x = 228,309,660.30/21,220.08
  6. Step 6: Final answer
    x = 10,759.13

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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.