Home / 3,130.98-4,321.44-2,815.68

Finding the Fourth Proportional to 3,130.98, 4,321.44 and 2,815.68

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Solution

The fourth proportional to 3,130.98, 4,321.44 and 2,815.68 is: 3,886.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,130.98 : 4,321.44 = 2,815.68 : x
  2. Step 2: Convert to fraction form
    3,130.98/4,321.44 = 2,815.68/x
  3. Step 3: Cross multiply
    3,130.98x = 4,321.44 × 2,815.68
  4. Step 4: Simplify right side
    3,130.98x = 12,167,792.18
  5. Step 5: Solve for x
    x = 12,167,792.18/3,130.98
  6. Step 6: Final answer
    x = 3,886.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.