Home / 13,390.99-18,479.60-7,422.75

Finding the Fourth Proportional to 13,390.99, 18,479.60 and 7,422.75

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Solution

The fourth proportional to 13,390.99, 18,479.60 and 7,422.75 is: 10,243.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,390.99 : 18,479.60 = 7,422.75 : x
  2. Step 2: Convert to fraction form
    13,390.99/18,479.60 = 7,422.75/x
  3. Step 3: Cross multiply
    13,390.99x = 18,479.60 × 7,422.75
  4. Step 4: Simplify right side
    13,390.99x = 137,169,450.90
  5. Step 5: Solve for x
    x = 137,169,450.90/13,390.99
  6. Step 6: Final answer
    x = 10,243.41

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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.