Home / 13,129.20-19,693.80-3,895.20

Finding the Fourth Proportional to 13,129.20, 19,693.80 and 3,895.20

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Solution

The fourth proportional to 13,129.20, 19,693.80 and 3,895.20 is: 5,842.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,129.20 : 19,693.80 = 3,895.20 : x
  2. Step 2: Convert to fraction form
    13,129.20/19,693.80 = 3,895.20/x
  3. Step 3: Cross multiply
    13,129.20x = 19,693.80 × 3,895.20
  4. Step 4: Simplify right side
    13,129.20x = 76,711,289.76
  5. Step 5: Solve for x
    x = 76,711,289.76/13,129.20
  6. Step 6: Final answer
    x = 5,842.80

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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.