Home / 13,684.78-18,884.56-7,716.36

Finding the Fourth Proportional to 13,684.78, 18,884.56 and 7,716.36

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Solution

The fourth proportional to 13,684.78, 18,884.56 and 7,716.36 is: 10,648.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,684.78 : 18,884.56 = 7,716.36 : x
  2. Step 2: Convert to fraction form
    13,684.78/18,884.56 = 7,716.36/x
  3. Step 3: Cross multiply
    13,684.78x = 18,884.56 × 7,716.36
  4. Step 4: Simplify right side
    13,684.78x = 145,720,063.40
  5. Step 5: Solve for x
    x = 145,720,063.40/13,684.78
  6. Step 6: Final answer
    x = 10,648.33

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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.