Home / 2,815.42-3,885.17-1,556.57

Finding the Fourth Proportional to 2,815.42, 3,885.17 and 1,556.57

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Solution

The fourth proportional to 2,815.42, 3,885.17 and 1,556.57 is: 2,148.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.42 : 3,885.17 = 1,556.57 : x
  2. Step 2: Convert to fraction form
    2,815.42/3,885.17 = 1,556.57/x
  3. Step 3: Cross multiply
    2,815.42x = 3,885.17 × 1,556.57
  4. Step 4: Simplify right side
    2,815.42x = 6,047,531.28
  5. Step 5: Solve for x
    x = 6,047,531.28/2,815.42
  6. Step 6: Final answer
    x = 2,148.01

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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.