Home / 7,139.75-10,708.45-1,946.03

Finding the Fourth Proportional to 7,139.75, 10,708.45 and 1,946.03

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Solution

The fourth proportional to 7,139.75, 10,708.45 and 1,946.03 is: 2,918.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,139.75 : 10,708.45 = 1,946.03 : x
  2. Step 2: Convert to fraction form
    7,139.75/10,708.45 = 1,946.03/x
  3. Step 3: Cross multiply
    7,139.75x = 10,708.45 × 1,946.03
  4. Step 4: Simplify right side
    7,139.75x = 20,838,906.55
  5. Step 5: Solve for x
    x = 20,838,906.55/7,139.75
  6. Step 6: Final answer
    x = 2,918.72

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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.