Home / 7,280.57-10,920.87-3,120.26

Finding the Fourth Proportional to 7,280.57, 10,920.87 and 3,120.26

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Solution

The fourth proportional to 7,280.57, 10,920.87 and 3,120.26 is: 4,680.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,280.57 : 10,920.87 = 3,120.26 : x
  2. Step 2: Convert to fraction form
    7,280.57/10,920.87 = 3,120.26/x
  3. Step 3: Cross multiply
    7,280.57x = 10,920.87 × 3,120.26
  4. Step 4: Simplify right side
    7,280.57x = 34,075,899.22
  5. Step 5: Solve for x
    x = 34,075,899.22/7,280.57
  6. Step 6: Final answer
    x = 4,680.39

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1.5x scale

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.