Home / 5,430.00-8,139.49-2,138.57

Finding the Fourth Proportional to 5,430.00, 8,139.49 and 2,138.57

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Solution

The fourth proportional to 5,430.00, 8,139.49 and 2,138.57 is: 3,205.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,430.00 : 8,139.49 = 2,138.57 : x
  2. Step 2: Convert to fraction form
    5,430.00/8,139.49 = 2,138.57/x
  3. Step 3: Cross multiply
    5,430.00x = 8,139.49 × 2,138.57
  4. Step 4: Simplify right side
    5,430.00x = 17,406,853.61
  5. Step 5: Solve for x
    x = 17,406,853.61/5,430.00
  6. Step 6: Final answer
    x = 3,205.68

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