Home / 13,105.70-19,657.65-4,220.90

Finding the Fourth Proportional to 13,105.70, 19,657.65 and 4,220.90

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Solution

The fourth proportional to 13,105.70, 19,657.65 and 4,220.90 is: 6,331.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,105.70 : 19,657.65 = 4,220.90 : x
  2. Step 2: Convert to fraction form
    13,105.70/19,657.65 = 4,220.90/x
  3. Step 3: Cross multiply
    13,105.70x = 19,657.65 × 4,220.90
  4. Step 4: Simplify right side
    13,105.70x = 82,972,974.89
  5. Step 5: Solve for x
    x = 82,972,974.89/13,105.70
  6. Step 6: Final answer
    x = 6,331.06

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1.5x scale

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.