Home / 13,290.32-18,340.49-7,321.87

Finding the Fourth Proportional to 13,290.32, 18,340.49 and 7,321.87

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Solution

The fourth proportional to 13,290.32, 18,340.49 and 7,321.87 is: 10,104.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,290.32 : 18,340.49 = 7,321.87 : x
  2. Step 2: Convert to fraction form
    13,290.32/18,340.49 = 7,321.87/x
  3. Step 3: Cross multiply
    13,290.32x = 18,340.49 × 7,321.87
  4. Step 4: Simplify right side
    13,290.32x = 134,286,724.75
  5. Step 5: Solve for x
    x = 134,286,724.75/13,290.32
  6. Step 6: Final answer
    x = 10,104.10

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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.