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Finding the Fourth Proportional to 13,840.60, 20,760.90 and 4,606.60

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Solution

The fourth proportional to 13,840.60, 20,760.90 and 4,606.60 is: 6,909.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,840.60 : 20,760.90 = 4,606.60 : x
  2. Step 2: Convert to fraction form
    13,840.60/20,760.90 = 4,606.60/x
  3. Step 3: Cross multiply
    13,840.60x = 20,760.90 × 4,606.60
  4. Step 4: Simplify right side
    13,840.60x = 95,637,161.94
  5. Step 5: Solve for x
    x = 95,637,161.94/13,840.60
  6. Step 6: Final answer
    x = 6,909.90

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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.