Home / 13,608.40-18,779.56-7,942.72

Finding the Fourth Proportional to 13,608.40, 18,779.56 and 7,942.72

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Solution

The fourth proportional to 13,608.40, 18,779.56 and 7,942.72 is: 10,960.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,608.40 : 18,779.56 = 7,942.72 : x
  2. Step 2: Convert to fraction form
    13,608.40/18,779.56 = 7,942.72/x
  3. Step 3: Cross multiply
    13,608.40x = 18,779.56 × 7,942.72
  4. Step 4: Simplify right side
    13,608.40x = 149,160,786.80
  5. Step 5: Solve for x
    x = 149,160,786.80/13,608.40
  6. Step 6: Final answer
    x = 10,960.93

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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.