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Finding the Fourth Proportional to 13,418.60, 20,130.60 and 11,242.40

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Solution

The fourth proportional to 13,418.60, 20,130.60 and 11,242.40 is: 16,865.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,418.60 : 20,130.60 = 11,242.40 : x
  2. Step 2: Convert to fraction form
    13,418.60/20,130.60 = 11,242.40/x
  3. Step 3: Cross multiply
    13,418.60x = 20,130.60 × 11,242.40
  4. Step 4: Simplify right side
    13,418.60x = 226,316,257.44
  5. Step 5: Solve for x
    x = 226,316,257.44/13,418.60
  6. Step 6: Final answer
    x = 16,865.86

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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.