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Finding the Fourth Proportional to 8,656.03, 11,947.77 and 5,120.47

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Solution

The fourth proportional to 8,656.03, 11,947.77 and 5,120.47 is: 7,067.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,656.03 : 11,947.77 = 5,120.47 : x
  2. Step 2: Convert to fraction form
    8,656.03/11,947.77 = 5,120.47/x
  3. Step 3: Cross multiply
    8,656.03x = 11,947.77 × 5,120.47
  4. Step 4: Simplify right side
    8,656.03x = 61,178,112.51
  5. Step 5: Solve for x
    x = 61,178,112.51/8,656.03
  6. Step 6: Final answer
    x = 7,067.69

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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.