Home / 2,142.26-2,955.38-1,355.81

Finding the Fourth Proportional to 2,142.26, 2,955.38 and 1,355.81

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Solution

The fourth proportional to 2,142.26, 2,955.38 and 1,355.81 is: 1,870.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,142.26 : 2,955.38 = 1,355.81 : x
  2. Step 2: Convert to fraction form
    2,142.26/2,955.38 = 1,355.81/x
  3. Step 3: Cross multiply
    2,142.26x = 2,955.38 × 1,355.81
  4. Step 4: Simplify right side
    2,142.26x = 4,006,934.37
  5. Step 5: Solve for x
    x = 4,006,934.37/2,142.26
  6. Step 6: Final answer
    x = 1,870.43

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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.