Home / 3,120.16-4,305.54-1,861.24

Finding the Fourth Proportional to 3,120.16, 4,305.54 and 1,861.24

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Solution

The fourth proportional to 3,120.16, 4,305.54 and 1,861.24 is: 2,568.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.16 : 4,305.54 = 1,861.24 : x
  2. Step 2: Convert to fraction form
    3,120.16/4,305.54 = 1,861.24/x
  3. Step 3: Cross multiply
    3,120.16x = 4,305.54 × 1,861.24
  4. Step 4: Simplify right side
    3,120.16x = 8,013,643.27
  5. Step 5: Solve for x
    x = 8,013,643.27/3,120.16
  6. Step 6: Final answer
    x = 2,568.34

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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.