Home / 20,641.14-30,961.71-8,320.50

Finding the Fourth Proportional to 20,641.14, 30,961.71 and 8,320.50

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Solution

The fourth proportional to 20,641.14, 30,961.71 and 8,320.50 is: 12,480.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,641.14 : 30,961.71 = 8,320.50 : x
  2. Step 2: Convert to fraction form
    20,641.14/30,961.71 = 8,320.50/x
  3. Step 3: Cross multiply
    20,641.14x = 30,961.71 × 8,320.50
  4. Step 4: Simplify right side
    20,641.14x = 257,616,908.06
  5. Step 5: Solve for x
    x = 257,616,908.06/20,641.14
  6. Step 6: Final answer
    x = 12,480.75

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.