Home / 20,128.10-27,777.30-11,175.98

Finding the Fourth Proportional to 20,128.10, 27,777.30 and 11,175.98

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Solution

The fourth proportional to 20,128.10, 27,777.30 and 11,175.98 is: 15,423.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,128.10 : 27,777.30 = 11,175.98 : x
  2. Step 2: Convert to fraction form
    20,128.10/27,777.30 = 11,175.98/x
  3. Step 3: Cross multiply
    20,128.10x = 27,777.30 × 11,175.98
  4. Step 4: Simplify right side
    20,128.10x = 310,438,549.25
  5. Step 5: Solve for x
    x = 310,438,549.25/20,128.10
  6. Step 6: Final answer
    x = 15,423.14

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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.