Home / 5,419.40-8,125.80-2,128.52

Finding the Fourth Proportional to 5,419.40, 8,125.80 and 2,128.52

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Solution

The fourth proportional to 5,419.40, 8,125.80 and 2,128.52 is: 3,191.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,419.40 : 8,125.80 = 2,128.52 : x
  2. Step 2: Convert to fraction form
    5,419.40/8,125.80 = 2,128.52/x
  3. Step 3: Cross multiply
    5,419.40x = 8,125.80 × 2,128.52
  4. Step 4: Simplify right side
    5,419.40x = 17,295,927.82
  5. Step 5: Solve for x
    x = 17,295,927.82/5,419.40
  6. Step 6: Final answer
    x = 3,191.48

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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.