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Finding the Fourth Proportional to 11,207.40, 15,467.40 and 6,491.40

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Solution

The fourth proportional to 11,207.40, 15,467.40 and 6,491.40 is: 8,958.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,207.40 : 15,467.40 = 6,491.40 : x
  2. Step 2: Convert to fraction form
    11,207.40/15,467.40 = 6,491.40/x
  3. Step 3: Cross multiply
    11,207.40x = 15,467.40 × 6,491.40
  4. Step 4: Simplify right side
    11,207.40x = 100,405,080.36
  5. Step 5: Solve for x
    x = 100,405,080.36/11,207.40
  6. Step 6: Final answer
    x = 8,958.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.