Home / 13,705.55-18,914.12-8,399.34

Finding the Fourth Proportional to 13,705.55, 18,914.12 and 8,399.34

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Solution

The fourth proportional to 13,705.55, 18,914.12 and 8,399.34 is: 11,591.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,705.55 : 18,914.12 = 8,399.34 : x
  2. Step 2: Convert to fraction form
    13,705.55/18,914.12 = 8,399.34/x
  3. Step 3: Cross multiply
    13,705.55x = 18,914.12 × 8,399.34
  4. Step 4: Simplify right side
    13,705.55x = 158,866,082.68
  5. Step 5: Solve for x
    x = 158,866,082.68/13,705.55
  6. Step 6: Final answer
    x = 11,591.37

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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.