Home / 20,211.68-27,890.88-11,258.72

Finding the Fourth Proportional to 20,211.68, 27,890.88 and 11,258.72

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Solution

The fourth proportional to 20,211.68, 27,890.88 and 11,258.72 is: 15,536.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,211.68 : 27,890.88 = 11,258.72 : x
  2. Step 2: Convert to fraction form
    20,211.68/27,890.88 = 11,258.72/x
  3. Step 3: Cross multiply
    20,211.68x = 27,890.88 × 11,258.72
  4. Step 4: Simplify right side
    20,211.68x = 314,015,608.47
  5. Step 5: Solve for x
    x = 314,015,608.47/20,211.68
  6. Step 6: Final answer
    x = 15,536.34

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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.