Home / 13,325.79-18,390.80-8,019.75

Finding the Fourth Proportional to 13,325.79, 18,390.80 and 8,019.75

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Solution

The fourth proportional to 13,325.79, 18,390.80 and 8,019.75 is: 11,067.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,325.79 : 18,390.80 = 8,019.75 : x
  2. Step 2: Convert to fraction form
    13,325.79/18,390.80 = 8,019.75/x
  3. Step 3: Cross multiply
    13,325.79x = 18,390.80 × 8,019.75
  4. Step 4: Simplify right side
    13,325.79x = 147,489,578.20
  5. Step 5: Solve for x
    x = 147,489,578.20/13,325.79
  6. Step 6: Final answer
    x = 11,067.98

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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.