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Finding the Fourth Proportional to 13,700.08, 18,906.11 and 7,412.45

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Solution

The fourth proportional to 13,700.08, 18,906.11 and 7,412.45 is: 10,229.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,700.08 : 18,906.11 = 7,412.45 : x
  2. Step 2: Convert to fraction form
    13,700.08/18,906.11 = 7,412.45/x
  3. Step 3: Cross multiply
    13,700.08x = 18,906.11 × 7,412.45
  4. Step 4: Simplify right side
    13,700.08x = 140,140,647.44
  5. Step 5: Solve for x
    x = 140,140,647.44/13,700.08
  6. Step 6: Final answer
    x = 10,229.19

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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.