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Finding the Fourth Proportional to 8,606.20, 11,879.10 and 5,070.55

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Solution

The fourth proportional to 8,606.20, 11,879.10 and 5,070.55 is: 6,998.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,606.20 : 11,879.10 = 5,070.55 : x
  2. Step 2: Convert to fraction form
    8,606.20/11,879.10 = 5,070.55/x
  3. Step 3: Cross multiply
    8,606.20x = 11,879.10 × 5,070.55
  4. Step 4: Simplify right side
    8,606.20x = 60,233,570.51
  5. Step 5: Solve for x
    x = 60,233,570.51/8,606.20
  6. Step 6: Final answer
    x = 6,998.86

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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.