Home / 13,211.40-19,826.70-5,425.80

Finding the Fourth Proportional to 13,211.40, 19,826.70 and 5,425.80

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Solution

The fourth proportional to 13,211.40, 19,826.70 and 5,425.80 is: 8,142.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,211.40 : 19,826.70 = 5,425.80 : x
  2. Step 2: Convert to fraction form
    13,211.40/19,826.70 = 5,425.80/x
  3. Step 3: Cross multiply
    13,211.40x = 19,826.70 × 5,425.80
  4. Step 4: Simplify right side
    13,211.40x = 107,575,708.86
  5. Step 5: Solve for x
    x = 107,575,708.86/13,211.40
  6. Step 6: Final answer
    x = 8,142.64

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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.