Home / 13,137.90-18,130.21-7,169.44

Finding the Fourth Proportional to 13,137.90, 18,130.21 and 7,169.44

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Solution

The fourth proportional to 13,137.90, 18,130.21 and 7,169.44 is: 9,893.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,137.90 : 18,130.21 = 7,169.44 : x
  2. Step 2: Convert to fraction form
    13,137.90/18,130.21 = 7,169.44/x
  3. Step 3: Cross multiply
    13,137.90x = 18,130.21 × 7,169.44
  4. Step 4: Simplify right side
    13,137.90x = 129,983,452.78
  5. Step 5: Solve for x
    x = 129,983,452.78/13,137.90
  6. Step 6: Final answer
    x = 9,893.78

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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.