Home / 11,910.80-16,429.64-7,877.60

Finding the Fourth Proportional to 11,910.80, 16,429.64 and 7,877.60

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Solution

The fourth proportional to 11,910.80, 16,429.64 and 7,877.60 is: 10,866.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,910.80 : 16,429.64 = 7,877.60 : x
  2. Step 2: Convert to fraction form
    11,910.80/16,429.64 = 7,877.60/x
  3. Step 3: Cross multiply
    11,910.80x = 16,429.64 × 7,877.60
  4. Step 4: Simplify right side
    11,910.80x = 129,426,164.56
  5. Step 5: Solve for x
    x = 129,426,164.56/11,910.80
  6. Step 6: Final answer
    x = 10,866.29

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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.