Home / 3,121.16-4,686.36-1,956.20

Finding the Fourth Proportional to 3,121.16, 4,686.36 and 1,956.20

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Solution

The fourth proportional to 3,121.16, 4,686.36 and 1,956.20 is: 2,937.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.16 : 4,686.36 = 1,956.20 : x
  2. Step 2: Convert to fraction form
    3,121.16/4,686.36 = 1,956.20/x
  3. Step 3: Cross multiply
    3,121.16x = 4,686.36 × 1,956.20
  4. Step 4: Simplify right side
    3,121.16x = 9,167,457.43
  5. Step 5: Solve for x
    x = 9,167,457.43/3,121.16
  6. Step 6: Final answer
    x = 2,937.20

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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.