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Finding the Fourth Proportional to 13,491.12, 18,619.68 and 7,902.24

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Solution

The fourth proportional to 13,491.12, 18,619.68 and 7,902.24 is: 10,906.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,491.12 : 18,619.68 = 7,902.24 : x
  2. Step 2: Convert to fraction form
    13,491.12/18,619.68 = 7,902.24/x
  3. Step 3: Cross multiply
    13,491.12x = 18,619.68 × 7,902.24
  4. Step 4: Simplify right side
    13,491.12x = 147,137,180.08
  5. Step 5: Solve for x
    x = 147,137,180.08/13,491.12
  6. Step 6: Final answer
    x = 10,906.22

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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.