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Finding the Fourth Proportional to 13,567.80, 20,351.70 and 9,631.20

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Solution

The fourth proportional to 13,567.80, 20,351.70 and 9,631.20 is: 14,446.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,567.80 : 20,351.70 = 9,631.20 : x
  2. Step 2: Convert to fraction form
    13,567.80/20,351.70 = 9,631.20/x
  3. Step 3: Cross multiply
    13,567.80x = 20,351.70 × 9,631.20
  4. Step 4: Simplify right side
    13,567.80x = 196,011,293.04
  5. Step 5: Solve for x
    x = 196,011,293.04/13,567.80
  6. Step 6: Final answer
    x = 14,446.80

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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.