Home / 2,803.36-3,868.72-1,561.36

Finding the Fourth Proportional to 2,803.36, 3,868.72 and 1,561.36

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Solution

The fourth proportional to 2,803.36, 3,868.72 and 1,561.36 is: 2,154.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,803.36 : 3,868.72 = 1,561.36 : x
  2. Step 2: Convert to fraction form
    2,803.36/3,868.72 = 1,561.36/x
  3. Step 3: Cross multiply
    2,803.36x = 3,868.72 × 1,561.36
  4. Step 4: Simplify right side
    2,803.36x = 6,040,464.66
  5. Step 5: Solve for x
    x = 6,040,464.66/2,803.36
  6. Step 6: Final answer
    x = 2,154.72

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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.