Home / 2,813.91-3,883.16-1,555.02

Finding the Fourth Proportional to 2,813.91, 3,883.16 and 1,555.02

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Solution

The fourth proportional to 2,813.91, 3,883.16 and 1,555.02 is: 2,145.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,813.91 : 3,883.16 = 1,555.02 : x
  2. Step 2: Convert to fraction form
    2,813.91/3,883.16 = 1,555.02/x
  3. Step 3: Cross multiply
    2,813.91x = 3,883.16 × 1,555.02
  4. Step 4: Simplify right side
    2,813.91x = 6,038,391.46
  5. Step 5: Solve for x
    x = 6,038,391.46/2,813.91
  6. Step 6: Final answer
    x = 2,145.91

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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.