Home / 13,290.63-18,340.25-7,321.97

Finding the Fourth Proportional to 13,290.63, 18,340.25 and 7,321.97

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Solution

The fourth proportional to 13,290.63, 18,340.25 and 7,321.97 is: 10,103.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,290.63 : 18,340.25 = 7,321.97 : x
  2. Step 2: Convert to fraction form
    13,290.63/18,340.25 = 7,321.97/x
  3. Step 3: Cross multiply
    13,290.63x = 18,340.25 × 7,321.97
  4. Step 4: Simplify right side
    13,290.63x = 134,286,631.98
  5. Step 5: Solve for x
    x = 134,286,631.98/13,290.63
  6. Step 6: Final answer
    x = 10,103.86

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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.