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Finding the Fourth Proportional to 19,885.54, 29,809.76 and 6,728.76

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Solution

The fourth proportional to 19,885.54, 29,809.76 and 6,728.76 is: 10,086.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,885.54 : 29,809.76 = 6,728.76 : x
  2. Step 2: Convert to fraction form
    19,885.54/29,809.76 = 6,728.76/x
  3. Step 3: Cross multiply
    19,885.54x = 29,809.76 × 6,728.76
  4. Step 4: Simplify right side
    19,885.54x = 200,582,720.70
  5. Step 5: Solve for x
    x = 200,582,720.70/19,885.54
  6. Step 6: Final answer
    x = 10,086.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.