Home / 13,422.78-20,134.18-4,189.50

Finding the Fourth Proportional to 13,422.78, 20,134.18 and 4,189.50

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Solution

The fourth proportional to 13,422.78, 20,134.18 and 4,189.50 is: 6,284.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,422.78 : 20,134.18 = 4,189.50 : x
  2. Step 2: Convert to fraction form
    13,422.78/20,134.18 = 4,189.50/x
  3. Step 3: Cross multiply
    13,422.78x = 20,134.18 × 4,189.50
  4. Step 4: Simplify right side
    13,422.78x = 84,352,147.11
  5. Step 5: Solve for x
    x = 84,352,147.11/13,422.78
  6. Step 6: Final answer
    x = 6,284.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.