Home / 13,436.48-18,540.94-7,770.36

Finding the Fourth Proportional to 13,436.48, 18,540.94 and 7,770.36

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Solution

The fourth proportional to 13,436.48, 18,540.94 and 7,770.36 is: 10,722.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,436.48 : 18,540.94 = 7,770.36 : x
  2. Step 2: Convert to fraction form
    13,436.48/18,540.94 = 7,770.36/x
  3. Step 3: Cross multiply
    13,436.48x = 18,540.94 × 7,770.36
  4. Step 4: Simplify right side
    13,436.48x = 144,069,778.54
  5. Step 5: Solve for x
    x = 144,069,778.54/13,436.48
  6. Step 6: Final answer
    x = 10,722.29

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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.