Home / 19,685.70-27,165.33-11,187.60

Finding the Fourth Proportional to 19,685.70, 27,165.33 and 11,187.60

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Solution

The fourth proportional to 19,685.70, 27,165.33 and 11,187.60 is: 15,438.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,685.70 : 27,165.33 = 11,187.60 : x
  2. Step 2: Convert to fraction form
    19,685.70/27,165.33 = 11,187.60/x
  3. Step 3: Cross multiply
    19,685.70x = 27,165.33 × 11,187.60
  4. Step 4: Simplify right side
    19,685.70x = 303,914,845.91
  5. Step 5: Solve for x
    x = 303,914,845.91/19,685.70
  6. Step 6: Final answer
    x = 15,438.36

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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.