Home / 13,137.40-18,129.27-7,169.14

Finding the Fourth Proportional to 13,137.40, 18,129.27 and 7,169.14

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Solution

The fourth proportional to 13,137.40, 18,129.27 and 7,169.14 is: 9,893.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,137.40 : 18,129.27 = 7,169.14 : x
  2. Step 2: Convert to fraction form
    13,137.40/18,129.27 = 7,169.14/x
  3. Step 3: Cross multiply
    13,137.40x = 18,129.27 × 7,169.14
  4. Step 4: Simplify right side
    13,137.40x = 129,971,274.73
  5. Step 5: Solve for x
    x = 129,971,274.73/13,137.40
  6. Step 6: Final answer
    x = 9,893.23

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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.