Home / 11,918.39-16,436.06-8,685.28

Finding the Fourth Proportional to 11,918.39, 16,436.06 and 8,685.28

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Solution

The fourth proportional to 11,918.39, 16,436.06 and 8,685.28 is: 11,977.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,918.39 : 16,436.06 = 8,685.28 : x
  2. Step 2: Convert to fraction form
    11,918.39/16,436.06 = 8,685.28/x
  3. Step 3: Cross multiply
    11,918.39x = 16,436.06 × 8,685.28
  4. Step 4: Simplify right side
    11,918.39x = 142,751,749.29
  5. Step 5: Solve for x
    x = 142,751,749.29/11,918.39
  6. Step 6: Final answer
    x = 11,977.44

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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.