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Finding the Fourth Proportional to 10,515.53, 15,773.30 and 7,218.63

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Solution

The fourth proportional to 10,515.53, 15,773.30 and 7,218.63 is: 10,827.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,515.53 : 15,773.30 = 7,218.63 : x
  2. Step 2: Convert to fraction form
    10,515.53/15,773.30 = 7,218.63/x
  3. Step 3: Cross multiply
    10,515.53x = 15,773.30 × 7,218.63
  4. Step 4: Simplify right side
    10,515.53x = 113,861,634.63
  5. Step 5: Solve for x
    x = 113,861,634.63/10,515.53
  6. Step 6: Final answer
    x = 10,827.95

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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.