Home / 13,141.21-18,135.27-7,173.43

Finding the Fourth Proportional to 13,141.21, 18,135.27 and 7,173.43

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Solution

The fourth proportional to 13,141.21, 18,135.27 and 7,173.43 is: 9,899.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,141.21 : 18,135.27 = 7,173.43 : x
  2. Step 2: Convert to fraction form
    13,141.21/18,135.27 = 7,173.43/x
  3. Step 3: Cross multiply
    13,141.21x = 18,135.27 × 7,173.43
  4. Step 4: Simplify right side
    13,141.21x = 130,092,089.88
  5. Step 5: Solve for x
    x = 130,092,089.88/13,141.21
  6. Step 6: Final answer
    x = 9,899.55

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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.