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Finding the Fourth Proportional to 7,215.55, 10,823.32 and 3,319.99

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Solution

The fourth proportional to 7,215.55, 10,823.32 and 3,319.99 is: 4,979.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,215.55 : 10,823.32 = 3,319.99 : x
  2. Step 2: Convert to fraction form
    7,215.55/10,823.32 = 3,319.99/x
  3. Step 3: Cross multiply
    7,215.55x = 10,823.32 × 3,319.99
  4. Step 4: Simplify right side
    7,215.55x = 35,933,291.26
  5. Step 5: Solve for x
    x = 35,933,291.26/7,215.55
  6. Step 6: Final answer
    x = 4,979.98

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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.