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Finding the Fourth Proportional to 13,812.60, 20,727.98 and 7,576.98

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Solution

The fourth proportional to 13,812.60, 20,727.98 and 7,576.98 is: 11,370.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,812.60 : 20,727.98 = 7,576.98 : x
  2. Step 2: Convert to fraction form
    13,812.60/20,727.98 = 7,576.98/x
  3. Step 3: Cross multiply
    13,812.60x = 20,727.98 × 7,576.98
  4. Step 4: Simplify right side
    13,812.60x = 157,055,452.02
  5. Step 5: Solve for x
    x = 157,055,452.02/13,812.60
  6. Step 6: Final answer
    x = 11,370.45

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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.