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Finding the Fourth Proportional to 8,347.69, 11,520.37 and 4,811.13

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Solution

The fourth proportional to 8,347.69, 11,520.37 and 4,811.13 is: 6,639.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,347.69 : 11,520.37 = 4,811.13 : x
  2. Step 2: Convert to fraction form
    8,347.69/11,520.37 = 4,811.13/x
  3. Step 3: Cross multiply
    8,347.69x = 11,520.37 × 4,811.13
  4. Step 4: Simplify right side
    8,347.69x = 55,425,997.72
  5. Step 5: Solve for x
    x = 55,425,997.72/8,347.69
  6. Step 6: Final answer
    x = 6,639.68

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Half scale
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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.