Home / 20,856.54-28,782.58-11,781.18

Finding the Fourth Proportional to 20,856.54, 28,782.58 and 11,781.18

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Solution

The fourth proportional to 20,856.54, 28,782.58 and 11,781.18 is: 16,258.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,856.54 : 28,782.58 = 11,781.18 : x
  2. Step 2: Convert to fraction form
    20,856.54/28,782.58 = 11,781.18/x
  3. Step 3: Cross multiply
    20,856.54x = 28,782.58 × 11,781.18
  4. Step 4: Simplify right side
    20,856.54x = 339,092,755.84
  5. Step 5: Solve for x
    x = 339,092,755.84/20,856.54
  6. Step 6: Final answer
    x = 16,258.34

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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.