Home / 6,280.79-9,420.96-2,120.18

Finding the Fourth Proportional to 6,280.79, 9,420.96 and 2,120.18

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Solution

The fourth proportional to 6,280.79, 9,420.96 and 2,120.18 is: 3,180.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,280.79 : 9,420.96 = 2,120.18 : x
  2. Step 2: Convert to fraction form
    6,280.79/9,420.96 = 2,120.18/x
  3. Step 3: Cross multiply
    6,280.79x = 9,420.96 × 2,120.18
  4. Step 4: Simplify right side
    6,280.79x = 19,974,079.89
  5. Step 5: Solve for x
    x = 19,974,079.89/6,280.79
  6. Step 6: Final answer
    x = 3,180.19

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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.