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Finding the Fourth Proportional to 14,953.71, 20,636.15 and 8,147.70

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Solution

The fourth proportional to 14,953.71, 20,636.15 and 8,147.70 is: 11,243.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,953.71 : 20,636.15 = 8,147.70 : x
  2. Step 2: Convert to fraction form
    14,953.71/20,636.15 = 8,147.70/x
  3. Step 3: Cross multiply
    14,953.71x = 20,636.15 × 8,147.70
  4. Step 4: Simplify right side
    14,953.71x = 168,137,118.62
  5. Step 5: Solve for x
    x = 168,137,118.62/14,953.71
  6. Step 6: Final answer
    x = 11,243.84

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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.