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Finding the Fourth Proportional to 20,563.60, 30,827.40 and 13,968.40

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Solution

The fourth proportional to 20,563.60, 30,827.40 and 13,968.40 is: 20,940.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,563.60 : 30,827.40 = 13,968.40 : x
  2. Step 2: Convert to fraction form
    20,563.60/30,827.40 = 13,968.40/x
  3. Step 3: Cross multiply
    20,563.60x = 30,827.40 × 13,968.40
  4. Step 4: Simplify right side
    20,563.60x = 430,609,454.16
  5. Step 5: Solve for x
    x = 430,609,454.16/20,563.60
  6. Step 6: Final answer
    x = 20,940.37

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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.