Home / 5,419.03-8,128.47-2,129.83

Finding the Fourth Proportional to 5,419.03, 8,128.47 and 2,129.83

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Solution

The fourth proportional to 5,419.03, 8,128.47 and 2,129.83 is: 3,194.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,419.03 : 8,128.47 = 2,129.83 : x
  2. Step 2: Convert to fraction form
    5,419.03/8,128.47 = 2,129.83/x
  3. Step 3: Cross multiply
    5,419.03x = 8,128.47 × 2,129.83
  4. Step 4: Simplify right side
    5,419.03x = 17,312,259.26
  5. Step 5: Solve for x
    x = 17,312,259.26/5,419.03
  6. Step 6: Final answer
    x = 3,194.72

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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.