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Finding the Fourth Proportional to 7,220.56, 9,965.64 and 6,892.24

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Solution

The fourth proportional to 7,220.56, 9,965.64 and 6,892.24 is: 9,512.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,220.56 : 9,965.64 = 6,892.24 : x
  2. Step 2: Convert to fraction form
    7,220.56/9,965.64 = 6,892.24/x
  3. Step 3: Cross multiply
    7,220.56x = 9,965.64 × 6,892.24
  4. Step 4: Simplify right side
    7,220.56x = 68,685,582.63
  5. Step 5: Solve for x
    x = 68,685,582.63/7,220.56
  6. Step 6: Final answer
    x = 9,512.50

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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.