Home / 13,515.92-18,655.56-7,930.64

Finding the Fourth Proportional to 13,515.92, 18,655.56 and 7,930.64

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Solution

The fourth proportional to 13,515.92, 18,655.56 and 7,930.64 is: 10,946.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,515.92 : 18,655.56 = 7,930.64 : x
  2. Step 2: Convert to fraction form
    13,515.92/18,655.56 = 7,930.64/x
  3. Step 3: Cross multiply
    13,515.92x = 18,655.56 × 7,930.64
  4. Step 4: Simplify right side
    13,515.92x = 147,950,530.36
  5. Step 5: Solve for x
    x = 147,950,530.36/13,515.92
  6. Step 6: Final answer
    x = 10,946.39

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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.