Home / 11,918.36-16,445.64-6,881.78

Finding the Fourth Proportional to 11,918.36, 16,445.64 and 6,881.78

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Solution

The fourth proportional to 11,918.36, 16,445.64 and 6,881.78 is: 9,495.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,918.36 : 16,445.64 = 6,881.78 : x
  2. Step 2: Convert to fraction form
    11,918.36/16,445.64 = 6,881.78/x
  3. Step 3: Cross multiply
    11,918.36x = 16,445.64 × 6,881.78
  4. Step 4: Simplify right side
    11,918.36x = 113,175,276.44
  5. Step 5: Solve for x
    x = 113,175,276.44/11,918.36
  6. Step 6: Final answer
    x = 9,495.88

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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.