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Finding the Fourth Proportional to 15,047.89, 20,764.38 and 8,331.83

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Solution

The fourth proportional to 15,047.89, 20,764.38 and 8,331.83 is: 11,496.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,047.89 : 20,764.38 = 8,331.83 : x
  2. Step 2: Convert to fraction form
    15,047.89/20,764.38 = 8,331.83/x
  3. Step 3: Cross multiply
    15,047.89x = 20,764.38 × 8,331.83
  4. Step 4: Simplify right side
    15,047.89x = 173,005,289.50
  5. Step 5: Solve for x
    x = 173,005,289.50/15,047.89
  6. Step 6: Final answer
    x = 11,496.98

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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.