Home / 5,139.22-7,710.56-1,629.80

Finding the Fourth Proportional to 5,139.22, 7,710.56 and 1,629.80

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Solution

The fourth proportional to 5,139.22, 7,710.56 and 1,629.80 is: 2,445.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,139.22 : 7,710.56 = 1,629.80 : x
  2. Step 2: Convert to fraction form
    5,139.22/7,710.56 = 1,629.80/x
  3. Step 3: Cross multiply
    5,139.22x = 7,710.56 × 1,629.80
  4. Step 4: Simplify right side
    5,139.22x = 12,566,670.69
  5. Step 5: Solve for x
    x = 12,566,670.69/5,139.22
  6. Step 6: Final answer
    x = 2,445.25

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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.