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Finding the Fourth Proportional to 8,696.10, 11,987.16 and 7,284.54

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Solution

The fourth proportional to 8,696.10, 11,987.16 and 7,284.54 is: 10,041.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,696.10 : 11,987.16 = 7,284.54 : x
  2. Step 2: Convert to fraction form
    8,696.10/11,987.16 = 7,284.54/x
  3. Step 3: Cross multiply
    8,696.10x = 11,987.16 × 7,284.54
  4. Step 4: Simplify right side
    8,696.10x = 87,320,946.51
  5. Step 5: Solve for x
    x = 87,320,946.51/8,696.10
  6. Step 6: Final answer
    x = 10,041.39

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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.