Home / 20,125.92-27,772.41-11,172.72

Finding the Fourth Proportional to 20,125.92, 27,772.41 and 11,172.72

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Solution

The fourth proportional to 20,125.92, 27,772.41 and 11,172.72 is: 15,417.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,125.92 : 27,772.41 = 11,172.72 : x
  2. Step 2: Convert to fraction form
    20,125.92/27,772.41 = 11,172.72/x
  3. Step 3: Cross multiply
    20,125.92x = 27,772.41 × 11,172.72
  4. Step 4: Simplify right side
    20,125.92x = 310,293,360.66
  5. Step 5: Solve for x
    x = 310,293,360.66/20,125.92
  6. Step 6: Final answer
    x = 15,417.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.