Home / 2,142.14-2,956.64-1,394.80

Finding the Fourth Proportional to 2,142.14, 2,956.64 and 1,394.80

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Solution

The fourth proportional to 2,142.14, 2,956.64 and 1,394.80 is: 1,925.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,142.14 : 2,956.64 = 1,394.80 : x
  2. Step 2: Convert to fraction form
    2,142.14/2,956.64 = 1,394.80/x
  3. Step 3: Cross multiply
    2,142.14x = 2,956.64 × 1,394.80
  4. Step 4: Simplify right side
    2,142.14x = 4,123,921.47
  5. Step 5: Solve for x
    x = 4,123,921.47/2,142.14
  6. Step 6: Final answer
    x = 1,925.14

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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.