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Finding the Fourth Proportional to 15,003.70, 20,705.32 and 8,716.07

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Solution

The fourth proportional to 15,003.70, 20,705.32 and 8,716.07 is: 12,028.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,003.70 : 20,705.32 = 8,716.07 : x
  2. Step 2: Convert to fraction form
    15,003.70/20,705.32 = 8,716.07/x
  3. Step 3: Cross multiply
    15,003.70x = 20,705.32 × 8,716.07
  4. Step 4: Simplify right side
    15,003.70x = 180,469,081.15
  5. Step 5: Solve for x
    x = 180,469,081.15/15,003.70
  6. Step 6: Final answer
    x = 12,028.31

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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.