Home / 13,399.86-18,492.40-7,431.12

Finding the Fourth Proportional to 13,399.86, 18,492.40 and 7,431.12

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Solution

The fourth proportional to 13,399.86, 18,492.40 and 7,431.12 is: 10,255.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,399.86 : 18,492.40 = 7,431.12 : x
  2. Step 2: Convert to fraction form
    13,399.86/18,492.40 = 7,431.12/x
  3. Step 3: Cross multiply
    13,399.86x = 18,492.40 × 7,431.12
  4. Step 4: Simplify right side
    13,399.86x = 137,419,243.49
  5. Step 5: Solve for x
    x = 137,419,243.49/13,399.86
  6. Step 6: Final answer
    x = 10,255.27

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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.