Home / 13,187.20-19,778.70-4,422.16

Finding the Fourth Proportional to 13,187.20, 19,778.70 and 4,422.16

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Solution

The fourth proportional to 13,187.20, 19,778.70 and 4,422.16 is: 6,632.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,187.20 : 19,778.70 = 4,422.16 : x
  2. Step 2: Convert to fraction form
    13,187.20/19,778.70 = 4,422.16/x
  3. Step 3: Cross multiply
    13,187.20x = 19,778.70 × 4,422.16
  4. Step 4: Simplify right side
    13,187.20x = 87,464,575.99
  5. Step 5: Solve for x
    x = 87,464,575.99/13,187.20
  6. Step 6: Final answer
    x = 6,632.54

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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.