Home / 13,126.99-18,115.62-7,158.77

Finding the Fourth Proportional to 13,126.99, 18,115.62 and 7,158.77

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Solution

The fourth proportional to 13,126.99, 18,115.62 and 7,158.77 is: 9,879.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,126.99 : 18,115.62 = 7,158.77 : x
  2. Step 2: Convert to fraction form
    13,126.99/18,115.62 = 7,158.77/x
  3. Step 3: Cross multiply
    13,126.99x = 18,115.62 × 7,158.77
  4. Step 4: Simplify right side
    13,126.99x = 129,685,556.99
  5. Step 5: Solve for x
    x = 129,685,556.99/13,126.99
  6. Step 6: Final answer
    x = 9,879.31

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Half 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.