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Finding the Fourth Proportional to 12,635.63, 18,953.19 and 5,613.74

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Solution

The fourth proportional to 12,635.63, 18,953.19 and 5,613.74 is: 8,420.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,635.63 : 18,953.19 = 5,613.74 : x
  2. Step 2: Convert to fraction form
    12,635.63/18,953.19 = 5,613.74/x
  3. Step 3: Cross multiply
    12,635.63x = 18,953.19 × 5,613.74
  4. Step 4: Simplify right side
    12,635.63x = 106,398,266.80
  5. Step 5: Solve for x
    x = 106,398,266.80/12,635.63
  6. Step 6: Final answer
    x = 8,420.50

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Half scale
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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.