Home / 2,135.58-3,178.47-2,115.06

Finding the Fourth Proportional to 2,135.58, 3,178.47 and 2,115.06

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Solution

The fourth proportional to 2,135.58, 3,178.47 and 2,115.06 is: 3,147.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,135.58 : 3,178.47 = 2,115.06 : x
  2. Step 2: Convert to fraction form
    2,135.58/3,178.47 = 2,115.06/x
  3. Step 3: Cross multiply
    2,135.58x = 3,178.47 × 2,115.06
  4. Step 4: Simplify right side
    2,135.58x = 6,722,654.76
  5. Step 5: Solve for x
    x = 6,722,654.76/2,135.58
  6. Step 6: Final answer
    x = 3,147.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.