Home / 20,211.62-27,890.98-11,258.78

Finding the Fourth Proportional to 20,211.62, 27,890.98 and 11,258.78

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Solution

The fourth proportional to 20,211.62, 27,890.98 and 11,258.78 is: 15,536.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,211.62 : 27,890.98 = 11,258.78 : x
  2. Step 2: Convert to fraction form
    20,211.62/27,890.98 = 11,258.78/x
  3. Step 3: Cross multiply
    20,211.62x = 27,890.98 × 11,258.78
  4. Step 4: Simplify right side
    20,211.62x = 314,018,240.20
  5. Step 5: Solve for x
    x = 314,018,240.20/20,211.62
  6. Step 6: Final answer
    x = 15,536.52

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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.