Home / 20,861.28-28,788.36-11,429.84

Finding the Fourth Proportional to 20,861.28, 28,788.36 and 11,429.84

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Solution

The fourth proportional to 20,861.28, 28,788.36 and 11,429.84 is: 15,773.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,861.28 : 28,788.36 = 11,429.84 : x
  2. Step 2: Convert to fraction form
    20,861.28/28,788.36 = 11,429.84/x
  3. Step 3: Cross multiply
    20,861.28x = 28,788.36 × 11,429.84
  4. Step 4: Simplify right side
    20,861.28x = 329,046,348.66
  5. Step 5: Solve for x
    x = 329,046,348.66/20,861.28
  6. Step 6: Final answer
    x = 15,773.07

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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.