Home / 13,740.60-20,620.62-7,817.88

Finding the Fourth Proportional to 13,740.60, 20,620.62 and 7,817.88

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Solution

The fourth proportional to 13,740.60, 20,620.62 and 7,817.88 is: 11,732.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,740.60 : 20,620.62 = 7,817.88 : x
  2. Step 2: Convert to fraction form
    13,740.60/20,620.62 = 7,817.88/x
  3. Step 3: Cross multiply
    13,740.60x = 20,620.62 × 7,817.88
  4. Step 4: Simplify right side
    13,740.60x = 161,209,532.69
  5. Step 5: Solve for x
    x = 161,209,532.69/13,740.60
  6. Step 6: Final answer
    x = 11,732.35

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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.