Home / 13,137.14-18,129.10-7,168.91

Finding the Fourth Proportional to 13,137.14, 18,129.10 and 7,168.91

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Solution

The fourth proportional to 13,137.14, 18,129.10 and 7,168.91 is: 9,893.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,137.14 : 18,129.10 = 7,168.91 : x
  2. Step 2: Convert to fraction form
    13,137.14/18,129.10 = 7,168.91/x
  3. Step 3: Cross multiply
    13,137.14x = 18,129.10 × 7,168.91
  4. Step 4: Simplify right side
    13,137.14x = 129,965,795.64
  5. Step 5: Solve for x
    x = 129,965,795.64/13,137.14
  6. Step 6: Final answer
    x = 9,893.01

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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.