Home / 13,421.82-18,522.24-7,371.66

Finding the Fourth Proportional to 13,421.82, 18,522.24 and 7,371.66

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Solution

The fourth proportional to 13,421.82, 18,522.24 and 7,371.66 is: 10,172.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,421.82 : 18,522.24 = 7,371.66 : x
  2. Step 2: Convert to fraction form
    13,421.82/18,522.24 = 7,371.66/x
  3. Step 3: Cross multiply
    13,421.82x = 18,522.24 × 7,371.66
  4. Step 4: Simplify right side
    13,421.82x = 136,539,655.72
  5. Step 5: Solve for x
    x = 136,539,655.72/13,421.82
  6. Step 6: Final answer
    x = 10,172.96

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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.