Home / 20,125.70-27,772.16-11,173.20

Finding the Fourth Proportional to 20,125.70, 27,772.16 and 11,173.20

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Solution

The fourth proportional to 20,125.70, 27,772.16 and 11,173.20 is: 15,418.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,125.70 : 27,772.16 = 11,173.20 : x
  2. Step 2: Convert to fraction form
    20,125.70/27,772.16 = 11,173.20/x
  3. Step 3: Cross multiply
    20,125.70x = 27,772.16 × 11,173.20
  4. Step 4: Simplify right side
    20,125.70x = 310,303,898.11
  5. Step 5: Solve for x
    x = 310,303,898.11/20,125.70
  6. Step 6: Final answer
    x = 15,418.29

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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.