Home / 2,135.64-2,947.37-1,239.71

Finding the Fourth Proportional to 2,135.64, 2,947.37 and 1,239.71

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Solution

The fourth proportional to 2,135.64, 2,947.37 and 1,239.71 is: 1,710.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,135.64 : 2,947.37 = 1,239.71 : x
  2. Step 2: Convert to fraction form
    2,135.64/2,947.37 = 1,239.71/x
  3. Step 3: Cross multiply
    2,135.64x = 2,947.37 × 1,239.71
  4. Step 4: Simplify right side
    2,135.64x = 3,653,874.18
  5. Step 5: Solve for x
    x = 3,653,874.18/2,135.64
  6. Step 6: Final answer
    x = 1,710.91

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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.