Home / 13,142.05-18,135.94-7,173.72

Finding the Fourth Proportional to 13,142.05, 18,135.94 and 7,173.72

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Solution

The fourth proportional to 13,142.05, 18,135.94 and 7,173.72 is: 9,899.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,142.05 : 18,135.94 = 7,173.72 : x
  2. Step 2: Convert to fraction form
    13,142.05/18,135.94 = 7,173.72/x
  3. Step 3: Cross multiply
    13,142.05x = 18,135.94 × 7,173.72
  4. Step 4: Simplify right side
    13,142.05x = 130,102,233.60
  5. Step 5: Solve for x
    x = 130,102,233.60/13,142.05
  6. Step 6: Final answer
    x = 9,899.69

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Half scale
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Double scale
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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.