Home / 13,431.04-20,163.84-7,279.36

Finding the Fourth Proportional to 13,431.04, 20,163.84 and 7,279.36

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Solution

The fourth proportional to 13,431.04, 20,163.84 and 7,279.36 is: 10,928.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,431.04 : 20,163.84 = 7,279.36 : x
  2. Step 2: Convert to fraction form
    13,431.04/20,163.84 = 7,279.36/x
  3. Step 3: Cross multiply
    13,431.04x = 20,163.84 × 7,279.36
  4. Step 4: Simplify right side
    13,431.04x = 146,779,850.34
  5. Step 5: Solve for x
    x = 146,779,850.34/13,431.04
  6. Step 6: Final answer
    x = 10,928.41

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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.