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Finding the Fourth Proportional to 9,131.40, 13,697.10 and 4,757.40

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Solution

The fourth proportional to 9,131.40, 13,697.10 and 4,757.40 is: 7,136.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,131.40 : 13,697.10 = 4,757.40 : x
  2. Step 2: Convert to fraction form
    9,131.40/13,697.10 = 4,757.40/x
  3. Step 3: Cross multiply
    9,131.40x = 13,697.10 × 4,757.40
  4. Step 4: Simplify right side
    9,131.40x = 65,162,583.54
  5. Step 5: Solve for x
    x = 65,162,583.54/9,131.40
  6. Step 6: Final answer
    x = 7,136.10

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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.