Home / 13,190.96-19,779.32-5,405.36

Finding the Fourth Proportional to 13,190.96, 19,779.32 and 5,405.36

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Solution

The fourth proportional to 13,190.96, 19,779.32 and 5,405.36 is: 8,105.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,190.96 : 19,779.32 = 5,405.36 : x
  2. Step 2: Convert to fraction form
    13,190.96/19,779.32 = 5,405.36/x
  3. Step 3: Cross multiply
    13,190.96x = 19,779.32 × 5,405.36
  4. Step 4: Simplify right side
    13,190.96x = 106,914,345.16
  5. Step 5: Solve for x
    x = 106,914,345.16/13,190.96
  6. Step 6: Final answer
    x = 8,105.12

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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.