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Finding the Fourth Proportional to 15,047.91, 20,766.69 and 8,333.40

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Solution

The fourth proportional to 15,047.91, 20,766.69 and 8,333.40 is: 11,500.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,047.91 : 20,766.69 = 8,333.40 : x
  2. Step 2: Convert to fraction form
    15,047.91/20,766.69 = 8,333.40/x
  3. Step 3: Cross multiply
    15,047.91x = 20,766.69 × 8,333.40
  4. Step 4: Simplify right side
    15,047.91x = 173,057,134.45
  5. Step 5: Solve for x
    x = 173,057,134.45/15,047.91
  6. Step 6: Final answer
    x = 11,500.41

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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.