Home / 2,135.78-2,946.43-1,251.20

Finding the Fourth Proportional to 2,135.78, 2,946.43 and 1,251.20

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Solution

The fourth proportional to 2,135.78, 2,946.43 and 1,251.20 is: 1,726.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,135.78 : 2,946.43 = 1,251.20 : x
  2. Step 2: Convert to fraction form
    2,135.78/2,946.43 = 1,251.20/x
  3. Step 3: Cross multiply
    2,135.78x = 2,946.43 × 1,251.20
  4. Step 4: Simplify right side
    2,135.78x = 3,686,573.22
  5. Step 5: Solve for x
    x = 3,686,573.22/2,135.78
  6. Step 6: Final answer
    x = 1,726.10

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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.