Home / 13,479.49-20,193.72-7,640.20

Finding the Fourth Proportional to 13,479.49, 20,193.72 and 7,640.20

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Solution

The fourth proportional to 13,479.49, 20,193.72 and 7,640.20 is: 11,445.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,479.49 : 20,193.72 = 7,640.20 : x
  2. Step 2: Convert to fraction form
    13,479.49/20,193.72 = 7,640.20/x
  3. Step 3: Cross multiply
    13,479.49x = 20,193.72 × 7,640.20
  4. Step 4: Simplify right side
    13,479.49x = 154,284,059.54
  5. Step 5: Solve for x
    x = 154,284,059.54/13,479.49
  6. Step 6: Final answer
    x = 11,445.84

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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.