Home / 13,137.53-18,129.48-7,169.20

Finding the Fourth Proportional to 13,137.53, 18,129.48 and 7,169.20

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Solution

The fourth proportional to 13,137.53, 18,129.48 and 7,169.20 is: 9,893.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,137.53 : 18,129.48 = 7,169.20 : x
  2. Step 2: Convert to fraction form
    13,137.53/18,129.48 = 7,169.20/x
  3. Step 3: Cross multiply
    13,137.53x = 18,129.48 × 7,169.20
  4. Step 4: Simplify right side
    13,137.53x = 129,973,868.02
  5. Step 5: Solve for x
    x = 129,973,868.02/13,137.53
  6. Step 6: Final answer
    x = 9,893.33

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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.