Home / 2,815.79-3,885.73-1,556.89

Finding the Fourth Proportional to 2,815.79, 3,885.73 and 1,556.89

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Solution

The fourth proportional to 2,815.79, 3,885.73 and 1,556.89 is: 2,148.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.79 : 3,885.73 = 1,556.89 : x
  2. Step 2: Convert to fraction form
    2,815.79/3,885.73 = 1,556.89/x
  3. Step 3: Cross multiply
    2,815.79x = 3,885.73 × 1,556.89
  4. Step 4: Simplify right side
    2,815.79x = 6,049,646.40
  5. Step 5: Solve for x
    x = 6,049,646.40/2,815.79
  6. Step 6: Final answer
    x = 2,148.48

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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.