Home / 13,290.17-18,340.67-7,321.80

Finding the Fourth Proportional to 13,290.17, 18,340.67 and 7,321.80

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Solution

The fourth proportional to 13,290.17, 18,340.67 and 7,321.80 is: 10,104.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,290.17 : 18,340.67 = 7,321.80 : x
  2. Step 2: Convert to fraction form
    13,290.17/18,340.67 = 7,321.80/x
  3. Step 3: Cross multiply
    13,290.17x = 18,340.67 × 7,321.80
  4. Step 4: Simplify right side
    13,290.17x = 134,286,735.91
  5. Step 5: Solve for x
    x = 134,286,735.91/13,290.17
  6. Step 6: Final answer
    x = 10,104.21

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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.