Home / 13,074.89-18,090.86-11,399.78

Finding the Fourth Proportional to 13,074.89, 18,090.86 and 11,399.78

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Solution

The fourth proportional to 13,074.89, 18,090.86 and 11,399.78 is: 15,773.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,074.89 : 18,090.86 = 11,399.78 : x
  2. Step 2: Convert to fraction form
    13,074.89/18,090.86 = 11,399.78/x
  3. Step 3: Cross multiply
    13,074.89x = 18,090.86 × 11,399.78
  4. Step 4: Simplify right side
    13,074.89x = 206,231,812.24
  5. Step 5: Solve for x
    x = 206,231,812.24/13,074.89
  6. Step 6: Final answer
    x = 15,773.13

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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.