Home / 13,638.65-20,458.37-5,318.33

Finding the Fourth Proportional to 13,638.65, 20,458.37 and 5,318.33

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Solution

The fourth proportional to 13,638.65, 20,458.37 and 5,318.33 is: 7,977.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,638.65 : 20,458.37 = 5,318.33 : x
  2. Step 2: Convert to fraction form
    13,638.65/20,458.37 = 5,318.33/x
  3. Step 3: Cross multiply
    13,638.65x = 20,458.37 × 5,318.33
  4. Step 4: Simplify right side
    13,638.65x = 108,804,273.93
  5. Step 5: Solve for x
    x = 108,804,273.93/13,638.65
  6. Step 6: Final answer
    x = 7,977.65

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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.