Home / 2,815.88-3,885.93-1,539.79

Finding the Fourth Proportional to 2,815.88, 3,885.93 and 1,539.79

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Solution

The fourth proportional to 2,815.88, 3,885.93 and 1,539.79 is: 2,124.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.88 : 3,885.93 = 1,539.79 : x
  2. Step 2: Convert to fraction form
    2,815.88/3,885.93 = 1,539.79/x
  3. Step 3: Cross multiply
    2,815.88x = 3,885.93 × 1,539.79
  4. Step 4: Simplify right side
    2,815.88x = 5,983,489.03
  5. Step 5: Solve for x
    x = 5,983,489.03/2,815.88
  6. Step 6: Final answer
    x = 2,124.91

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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.