Home / 3,121.47-4,303.28-2,175.89

Finding the Fourth Proportional to 3,121.47, 4,303.28 and 2,175.89

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Solution

The fourth proportional to 3,121.47, 4,303.28 and 2,175.89 is: 2,999.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.47 : 4,303.28 = 2,175.89 : x
  2. Step 2: Convert to fraction form
    3,121.47/4,303.28 = 2,175.89/x
  3. Step 3: Cross multiply
    3,121.47x = 4,303.28 × 2,175.89
  4. Step 4: Simplify right side
    3,121.47x = 9,363,447.84
  5. Step 5: Solve for x
    x = 9,363,447.84/3,121.47
  6. Step 6: Final answer
    x = 2,999.69

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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.