Home / 5,139.90-7,709.57-1,442.39

Finding the Fourth Proportional to 5,139.90, 7,709.57 and 1,442.39

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Solution

The fourth proportional to 5,139.90, 7,709.57 and 1,442.39 is: 2,163.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,139.90 : 7,709.57 = 1,442.39 : x
  2. Step 2: Convert to fraction form
    5,139.90/7,709.57 = 1,442.39/x
  3. Step 3: Cross multiply
    5,139.90x = 7,709.57 × 1,442.39
  4. Step 4: Simplify right side
    5,139.90x = 11,120,168.12
  5. Step 5: Solve for x
    x = 11,120,168.12/5,139.90
  6. Step 6: Final answer
    x = 2,163.50

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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.