Home / 2,815.39-3,885.23-1,573.39

Finding the Fourth Proportional to 2,815.39, 3,885.23 and 1,573.39

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Solution

The fourth proportional to 2,815.39, 3,885.23 and 1,573.39 is: 2,171.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.39 : 3,885.23 = 1,573.39 : x
  2. Step 2: Convert to fraction form
    2,815.39/3,885.23 = 1,573.39/x
  3. Step 3: Cross multiply
    2,815.39x = 3,885.23 × 1,573.39
  4. Step 4: Simplify right side
    2,815.39x = 6,112,968.97
  5. Step 5: Solve for x
    x = 6,112,968.97/2,815.39
  6. Step 6: Final answer
    x = 2,171.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.