Home / 13,491.42-18,619.11-7,905.66

Finding the Fourth Proportional to 13,491.42, 18,619.11 and 7,905.66

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Solution

The fourth proportional to 13,491.42, 18,619.11 and 7,905.66 is: 10,910.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,491.42 : 18,619.11 = 7,905.66 : x
  2. Step 2: Convert to fraction form
    13,491.42/18,619.11 = 7,905.66/x
  3. Step 3: Cross multiply
    13,491.42x = 18,619.11 × 7,905.66
  4. Step 4: Simplify right side
    13,491.42x = 147,196,353.16
  5. Step 5: Solve for x
    x = 147,196,353.16/13,491.42
  6. Step 6: Final answer
    x = 10,910.37

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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.