Home / 3,128.76-4,299.61-2,984.20

Finding the Fourth Proportional to 3,128.76, 4,299.61 and 2,984.20

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Solution

The fourth proportional to 3,128.76, 4,299.61 and 2,984.20 is: 4,100.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.76 : 4,299.61 = 2,984.20 : x
  2. Step 2: Convert to fraction form
    3,128.76/4,299.61 = 2,984.20/x
  3. Step 3: Cross multiply
    3,128.76x = 4,299.61 × 2,984.20
  4. Step 4: Simplify right side
    3,128.76x = 12,830,881.24
  5. Step 5: Solve for x
    x = 12,830,881.24/3,128.76
  6. Step 6: Final answer
    x = 4,100.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.