Home / 15,338.85-21,160.68-9,669.66

Finding the Fourth Proportional to 15,338.85, 21,160.68 and 9,669.66

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Solution

The fourth proportional to 15,338.85, 21,160.68 and 9,669.66 is: 13,339.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,338.85 : 21,160.68 = 9,669.66 : x
  2. Step 2: Convert to fraction form
    15,338.85/21,160.68 = 9,669.66/x
  3. Step 3: Cross multiply
    15,338.85x = 21,160.68 × 9,669.66
  4. Step 4: Simplify right side
    15,338.85x = 204,616,580.97
  5. Step 5: Solve for x
    x = 204,616,580.97/15,338.85
  6. Step 6: Final answer
    x = 13,339.76

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Half scale
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Double scale
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Similar ratio
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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.