Home / 20,240.12-27,931.52-11,288.20

Finding the Fourth Proportional to 20,240.12, 27,931.52 and 11,288.20

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Solution

The fourth proportional to 20,240.12, 27,931.52 and 11,288.20 is: 15,577.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,240.12 : 27,931.52 = 11,288.20 : x
  2. Step 2: Convert to fraction form
    20,240.12/27,931.52 = 11,288.20/x
  3. Step 3: Cross multiply
    20,240.12x = 27,931.52 × 11,288.20
  4. Step 4: Simplify right side
    20,240.12x = 315,296,584.06
  5. Step 5: Solve for x
    x = 315,296,584.06/20,240.12
  6. Step 6: Final answer
    x = 15,577.80

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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.