Home / 13,186.20-18,196.04-7,521.19

Finding the Fourth Proportional to 13,186.20, 18,196.04 and 7,521.19

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Solution

The fourth proportional to 13,186.20, 18,196.04 and 7,521.19 is: 10,378.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,186.20 : 18,196.04 = 7,521.19 : x
  2. Step 2: Convert to fraction form
    13,186.20/18,196.04 = 7,521.19/x
  3. Step 3: Cross multiply
    13,186.20x = 18,196.04 × 7,521.19
  4. Step 4: Simplify right side
    13,186.20x = 136,855,874.09
  5. Step 5: Solve for x
    x = 136,855,874.09/13,186.20
  6. Step 6: Final answer
    x = 10,378.72

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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.