Home / 7,872.20-10,858.02-5,075

Finding the Fourth Proportional to 7,872.20, 10,858.02 and 5,075

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Solution

The fourth proportional to 7,872.20, 10,858.02 and 5,075 is: 6,999.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,872.20 : 10,858.02 = 5,075 : x
  2. Step 2: Convert to fraction form
    7,872.20/10,858.02 = 5,075/x
  3. Step 3: Cross multiply
    7,872.20x = 10,858.02 × 5,075
  4. Step 4: Simplify right side
    7,872.20x = 55,104,451.50
  5. Step 5: Solve for x
    x = 55,104,451.50/7,872.20
  6. Step 6: Final answer
    x = 6,999.88

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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.