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Finding the Fourth Proportional to 13,370.40, 20,104.20 and 13,078.80

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Solution

The fourth proportional to 13,370.40, 20,104.20 and 13,078.80 is: 19,665.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,370.40 : 20,104.20 = 13,078.80 : x
  2. Step 2: Convert to fraction form
    13,370.40/20,104.20 = 13,078.80/x
  3. Step 3: Cross multiply
    13,370.40x = 20,104.20 × 13,078.80
  4. Step 4: Simplify right side
    13,370.40x = 262,938,810.96
  5. Step 5: Solve for x
    x = 262,938,810.96/13,370.40
  6. Step 6: Final answer
    x = 19,665.74

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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.