Home / 5,211.45-7,191.78-2,853.63

Finding the Fourth Proportional to 5,211.45, 7,191.78 and 2,853.63

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Solution

The fourth proportional to 5,211.45, 7,191.78 and 2,853.63 is: 3,938.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,211.45 : 7,191.78 = 2,853.63 : x
  2. Step 2: Convert to fraction form
    5,211.45/7,191.78 = 2,853.63/x
  3. Step 3: Cross multiply
    5,211.45x = 7,191.78 × 2,853.63
  4. Step 4: Simplify right side
    5,211.45x = 20,522,679.16
  5. Step 5: Solve for x
    x = 20,522,679.16/5,211.45
  6. Step 6: Final answer
    x = 3,938.00

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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.