Home / 2,121.54-2,925.87-1,374.80

Finding the Fourth Proportional to 2,121.54, 2,925.87 and 1,374.80

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Solution

The fourth proportional to 2,121.54, 2,925.87 and 1,374.80 is: 1,896.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.54 : 2,925.87 = 1,374.80 : x
  2. Step 2: Convert to fraction form
    2,121.54/2,925.87 = 1,374.80/x
  3. Step 3: Cross multiply
    2,121.54x = 2,925.87 × 1,374.80
  4. Step 4: Simplify right side
    2,121.54x = 4,022,471.45
  5. Step 5: Solve for x
    x = 4,022,471.45/2,121.54
  6. Step 6: Final answer
    x = 1,896.01

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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.