Home / 13,458.67-20,188.74-5,139.36

Finding the Fourth Proportional to 13,458.67, 20,188.74 and 5,139.36

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Solution

The fourth proportional to 13,458.67, 20,188.74 and 5,139.36 is: 7,709.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,458.67 : 20,188.74 = 5,139.36 : x
  2. Step 2: Convert to fraction form
    13,458.67/20,188.74 = 5,139.36/x
  3. Step 3: Cross multiply
    13,458.67x = 20,188.74 × 5,139.36
  4. Step 4: Simplify right side
    13,458.67x = 103,757,202.81
  5. Step 5: Solve for x
    x = 103,757,202.81/13,458.67
  6. Step 6: Final answer
    x = 7,709.32

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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.