Home / 3,087.81-4,262.54-1,970.21

Finding the Fourth Proportional to 3,087.81, 4,262.54 and 1,970.21

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Solution

The fourth proportional to 3,087.81, 4,262.54 and 1,970.21 is: 2,719.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,087.81 : 4,262.54 = 1,970.21 : x
  2. Step 2: Convert to fraction form
    3,087.81/4,262.54 = 1,970.21/x
  3. Step 3: Cross multiply
    3,087.81x = 4,262.54 × 1,970.21
  4. Step 4: Simplify right side
    3,087.81x = 8,398,067.77
  5. Step 5: Solve for x
    x = 8,398,067.77/3,087.81
  6. Step 6: Final answer
    x = 2,719.75

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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.