Home / 20,231-27,918.50-11,279.24

Finding the Fourth Proportional to 20,231, 27,918.50 and 11,279.24

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Solution

The fourth proportional to 20,231, 27,918.50 and 11,279.24 is: 15,565.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,231 : 27,918.50 = 11,279.24 : x
  2. Step 2: Convert to fraction form
    20,231/27,918.50 = 11,279.24/x
  3. Step 3: Cross multiply
    20,231x = 27,918.50 × 11,279.24
  4. Step 4: Simplify right side
    20,231x = 314,899,461.94
  5. Step 5: Solve for x
    x = 314,899,461.94/20,231
  6. Step 6: Final answer
    x = 15,565.20

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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.