Home / 2,785.93-3,840.50-2,121.63

Finding the Fourth Proportional to 2,785.93, 3,840.50 and 2,121.63

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Solution

The fourth proportional to 2,785.93, 3,840.50 and 2,121.63 is: 2,924.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,785.93 : 3,840.50 = 2,121.63 : x
  2. Step 2: Convert to fraction form
    2,785.93/3,840.50 = 2,121.63/x
  3. Step 3: Cross multiply
    2,785.93x = 3,840.50 × 2,121.63
  4. Step 4: Simplify right side
    2,785.93x = 8,148,120.02
  5. Step 5: Solve for x
    x = 8,148,120.02/2,785.93
  6. Step 6: Final answer
    x = 2,924.74

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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.