Home / 13,349.21-18,420.29-7,380.06

Finding the Fourth Proportional to 13,349.21, 18,420.29 and 7,380.06

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Solution

The fourth proportional to 13,349.21, 18,420.29 and 7,380.06 is: 10,183.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,349.21 : 18,420.29 = 7,380.06 : x
  2. Step 2: Convert to fraction form
    13,349.21/18,420.29 = 7,380.06/x
  3. Step 3: Cross multiply
    13,349.21x = 18,420.29 × 7,380.06
  4. Step 4: Simplify right side
    13,349.21x = 135,942,808.52
  5. Step 5: Solve for x
    x = 135,942,808.52/13,349.21
  6. Step 6: Final answer
    x = 10,183.59

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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.