Home / 3,128.10-4,697.10-2,900.70

Finding the Fourth Proportional to 3,128.10, 4,697.10 and 2,900.70

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Solution

The fourth proportional to 3,128.10, 4,697.10 and 2,900.70 is: 4,355.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.10 : 4,697.10 = 2,900.70 : x
  2. Step 2: Convert to fraction form
    3,128.10/4,697.10 = 2,900.70/x
  3. Step 3: Cross multiply
    3,128.10x = 4,697.10 × 2,900.70
  4. Step 4: Simplify right side
    3,128.10x = 13,624,877.97
  5. Step 5: Solve for x
    x = 13,624,877.97/3,128.10
  6. Step 6: Final answer
    x = 4,355.64

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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.