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Finding the Fourth Proportional to 20,210.82, 27,890.82 and 11,258.40

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Solution

The fourth proportional to 20,210.82, 27,890.82 and 11,258.40 is: 15,536.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,210.82 : 27,890.82 = 11,258.40 : x
  2. Step 2: Convert to fraction form
    20,210.82/27,890.82 = 11,258.40/x
  3. Step 3: Cross multiply
    20,210.82x = 27,890.82 × 11,258.40
  4. Step 4: Simplify right side
    20,210.82x = 314,006,007.89
  5. Step 5: Solve for x
    x = 314,006,007.89/20,210.82
  6. Step 6: Final answer
    x = 15,536.53

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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.