Home / 8,680.70-13,021.63-3,415.30

Finding the Fourth Proportional to 8,680.70, 13,021.63 and 3,415.30

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Solution

The fourth proportional to 8,680.70, 13,021.63 and 3,415.30 is: 5,123.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,680.70 : 13,021.63 = 3,415.30 : x
  2. Step 2: Convert to fraction form
    8,680.70/13,021.63 = 3,415.30/x
  3. Step 3: Cross multiply
    8,680.70x = 13,021.63 × 3,415.30
  4. Step 4: Simplify right side
    8,680.70x = 44,472,731.85
  5. Step 5: Solve for x
    x = 44,472,731.85/8,680.70
  6. Step 6: Final answer
    x = 5,123.17

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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.