Home / 15,015.21-20,722.13-8,301.12

Finding the Fourth Proportional to 15,015.21, 20,722.13 and 8,301.12

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Solution

The fourth proportional to 15,015.21, 20,722.13 and 8,301.12 is: 11,456.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,015.21 : 20,722.13 = 8,301.12 : x
  2. Step 2: Convert to fraction form
    15,015.21/20,722.13 = 8,301.12/x
  3. Step 3: Cross multiply
    15,015.21x = 20,722.13 × 8,301.12
  4. Step 4: Simplify right side
    15,015.21x = 172,016,887.79
  5. Step 5: Solve for x
    x = 172,016,887.79/15,015.21
  6. Step 6: Final answer
    x = 11,456.18

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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.