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Finding the Fourth Proportional to 13,980.72, 20,964.60 and 5,654.16

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Solution

The fourth proportional to 13,980.72, 20,964.60 and 5,654.16 is: 8,478.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,980.72 : 20,964.60 = 5,654.16 : x
  2. Step 2: Convert to fraction form
    13,980.72/20,964.60 = 5,654.16/x
  3. Step 3: Cross multiply
    13,980.72x = 20,964.60 × 5,654.16
  4. Step 4: Simplify right side
    13,980.72x = 118,537,202.74
  5. Step 5: Solve for x
    x = 118,537,202.74/13,980.72
  6. Step 6: Final answer
    x = 8,478.62

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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.