Home / 2,820.13-3,891.80-1,561.22

Finding the Fourth Proportional to 2,820.13, 3,891.80 and 1,561.22

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Solution

The fourth proportional to 2,820.13, 3,891.80 and 1,561.22 is: 2,154.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,820.13 : 3,891.80 = 1,561.22 : x
  2. Step 2: Convert to fraction form
    2,820.13/3,891.80 = 1,561.22/x
  3. Step 3: Cross multiply
    2,820.13x = 3,891.80 × 1,561.22
  4. Step 4: Simplify right side
    2,820.13x = 6,075,956.00
  5. Step 5: Solve for x
    x = 6,075,956.00/2,820.13
  6. Step 6: Final answer
    x = 2,154.50

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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.