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Finding the Fourth Proportional to 11,695.56, 16,140.11 and 6,390.71

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Solution

The fourth proportional to 11,695.56, 16,140.11 and 6,390.71 is: 8,819.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,695.56 : 16,140.11 = 6,390.71 : x
  2. Step 2: Convert to fraction form
    11,695.56/16,140.11 = 6,390.71/x
  3. Step 3: Cross multiply
    11,695.56x = 16,140.11 × 6,390.71
  4. Step 4: Simplify right side
    11,695.56x = 103,146,649.72
  5. Step 5: Solve for x
    x = 103,146,649.72/11,695.56
  6. Step 6: Final answer
    x = 8,819.30

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Double scale
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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.