Home / 13,138.09-18,130.26-7,169.92

Finding the Fourth Proportional to 13,138.09, 18,130.26 and 7,169.92

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Solution

The fourth proportional to 13,138.09, 18,130.26 and 7,169.92 is: 9,894.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,138.09 : 18,130.26 = 7,169.92 : x
  2. Step 2: Convert to fraction form
    13,138.09/18,130.26 = 7,169.92/x
  3. Step 3: Cross multiply
    13,138.09x = 18,130.26 × 7,169.92
  4. Step 4: Simplify right side
    13,138.09x = 129,992,513.78
  5. Step 5: Solve for x
    x = 129,992,513.78/13,138.09
  6. Step 6: Final answer
    x = 9,894.32

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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.