Home / 2,631.39-3,938.87-1,938.84

Finding the Fourth Proportional to 2,631.39, 3,938.87 and 1,938.84

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Solution

The fourth proportional to 2,631.39, 3,938.87 and 1,938.84 is: 2,902.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,631.39 : 3,938.87 = 1,938.84 : x
  2. Step 2: Convert to fraction form
    2,631.39/3,938.87 = 1,938.84/x
  3. Step 3: Cross multiply
    2,631.39x = 3,938.87 × 1,938.84
  4. Step 4: Simplify right side
    2,631.39x = 7,636,829.02
  5. Step 5: Solve for x
    x = 7,636,829.02/2,631.39
  6. Step 6: Final answer
    x = 2,902.20

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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.