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Finding the Fourth Proportional to 8,486.94, 11,710.17 and 5,129.09

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Solution

The fourth proportional to 8,486.94, 11,710.17 and 5,129.09 is: 7,077.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,486.94 : 11,710.17 = 5,129.09 : x
  2. Step 2: Convert to fraction form
    8,486.94/11,710.17 = 5,129.09/x
  3. Step 3: Cross multiply
    8,486.94x = 11,710.17 × 5,129.09
  4. Step 4: Simplify right side
    8,486.94x = 60,062,501.21
  5. Step 5: Solve for x
    x = 60,062,501.21/8,486.94
  6. Step 6: Final answer
    x = 7,077.05

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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.