Home / 7,075.40-10,611.28-2,143.72

Finding the Fourth Proportional to 7,075.40, 10,611.28 and 2,143.72

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Solution

The fourth proportional to 7,075.40, 10,611.28 and 2,143.72 is: 3,215.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,075.40 : 10,611.28 = 2,143.72 : x
  2. Step 2: Convert to fraction form
    7,075.40/10,611.28 = 2,143.72/x
  3. Step 3: Cross multiply
    7,075.40x = 10,611.28 × 2,143.72
  4. Step 4: Simplify right side
    7,075.40x = 22,747,563.39
  5. Step 5: Solve for x
    x = 22,747,563.39/7,075.40
  6. Step 6: Final answer
    x = 3,215.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.