Home / 15,309.24-21,121.72-9,338.76

Finding the Fourth Proportional to 15,309.24, 21,121.72 and 9,338.76

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Solution

The fourth proportional to 15,309.24, 21,121.72 and 9,338.76 is: 12,884.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,309.24 : 21,121.72 = 9,338.76 : x
  2. Step 2: Convert to fraction form
    15,309.24/21,121.72 = 9,338.76/x
  3. Step 3: Cross multiply
    15,309.24x = 21,121.72 × 9,338.76
  4. Step 4: Simplify right side
    15,309.24x = 197,250,673.87
  5. Step 5: Solve for x
    x = 197,250,673.87/15,309.24
  6. Step 6: Final answer
    x = 12,884.42

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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.