Home / 15,910.70-21,958.51-9,105.35

Finding the Fourth Proportional to 15,910.70, 21,958.51 and 9,105.35

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Solution

The fourth proportional to 15,910.70, 21,958.51 and 9,105.35 is: 12,566.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,910.70 : 21,958.51 = 9,105.35 : x
  2. Step 2: Convert to fraction form
    15,910.70/21,958.51 = 9,105.35/x
  3. Step 3: Cross multiply
    15,910.70x = 21,958.51 × 9,105.35
  4. Step 4: Simplify right side
    15,910.70x = 199,939,919.03
  5. Step 5: Solve for x
    x = 199,939,919.03/15,910.70
  6. Step 6: Final answer
    x = 12,566.38

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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.