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Finding the Fourth Proportional to 13,630.80, 20,446.20 and 5,840.40

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Solution

The fourth proportional to 13,630.80, 20,446.20 and 5,840.40 is: 8,760.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,630.80 : 20,446.20 = 5,840.40 : x
  2. Step 2: Convert to fraction form
    13,630.80/20,446.20 = 5,840.40/x
  3. Step 3: Cross multiply
    13,630.80x = 20,446.20 × 5,840.40
  4. Step 4: Simplify right side
    13,630.80x = 119,413,986.48
  5. Step 5: Solve for x
    x = 119,413,986.48/13,630.80
  6. Step 6: Final answer
    x = 8,760.60

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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.