Home / 13,740.40-18,961.84-7,772.64

Finding the Fourth Proportional to 13,740.40, 18,961.84 and 7,772.64

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Solution

The fourth proportional to 13,740.40, 18,961.84 and 7,772.64 is: 10,726.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,740.40 : 18,961.84 = 7,772.64 : x
  2. Step 2: Convert to fraction form
    13,740.40/18,961.84 = 7,772.64/x
  3. Step 3: Cross multiply
    13,740.40x = 18,961.84 × 7,772.64
  4. Step 4: Simplify right side
    13,740.40x = 147,383,556.06
  5. Step 5: Solve for x
    x = 147,383,556.06/13,740.40
  6. Step 6: Final answer
    x = 10,726.29

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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.