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Finding the Fourth Proportional to 13,085.22, 18,057.22 and 7,420.49

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Solution

The fourth proportional to 13,085.22, 18,057.22 and 7,420.49 is: 10,240.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,085.22 : 18,057.22 = 7,420.49 : x
  2. Step 2: Convert to fraction form
    13,085.22/18,057.22 = 7,420.49/x
  3. Step 3: Cross multiply
    13,085.22x = 18,057.22 × 7,420.49
  4. Step 4: Simplify right side
    13,085.22x = 133,993,311.60
  5. Step 5: Solve for x
    x = 133,993,311.60/13,085.22
  6. Step 6: Final answer
    x = 10,240.05

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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.