Home / 10,405.36-15,608.30-3,385.40

Finding the Fourth Proportional to 10,405.36, 15,608.30 and 3,385.40

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Solution

The fourth proportional to 10,405.36, 15,608.30 and 3,385.40 is: 5,078.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,405.36 : 15,608.30 = 3,385.40 : x
  2. Step 2: Convert to fraction form
    10,405.36/15,608.30 = 3,385.40/x
  3. Step 3: Cross multiply
    10,405.36x = 15,608.30 × 3,385.40
  4. Step 4: Simplify right side
    10,405.36x = 52,840,243.85
  5. Step 5: Solve for x
    x = 52,840,243.85/10,405.36
  6. Step 6: Final answer
    x = 5,078.17

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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.