Home / 13,321.80-19,982.70-7,478.28

Finding the Fourth Proportional to 13,321.80, 19,982.70 and 7,478.28

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Solution

The fourth proportional to 13,321.80, 19,982.70 and 7,478.28 is: 11,217.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,321.80 : 19,982.70 = 7,478.28 : x
  2. Step 2: Convert to fraction form
    13,321.80/19,982.70 = 7,478.28/x
  3. Step 3: Cross multiply
    13,321.80x = 19,982.70 × 7,478.28
  4. Step 4: Simplify right side
    13,321.80x = 149,436,225.76
  5. Step 5: Solve for x
    x = 149,436,225.76/13,321.80
  6. Step 6: Final answer
    x = 11,217.42

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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.