Home / 2,942.39-4,056.81-2,155.07

Finding the Fourth Proportional to 2,942.39, 4,056.81 and 2,155.07

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Solution

The fourth proportional to 2,942.39, 4,056.81 and 2,155.07 is: 2,971.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,942.39 : 4,056.81 = 2,155.07 : x
  2. Step 2: Convert to fraction form
    2,942.39/4,056.81 = 2,155.07/x
  3. Step 3: Cross multiply
    2,942.39x = 4,056.81 × 2,155.07
  4. Step 4: Simplify right side
    2,942.39x = 8,742,709.53
  5. Step 5: Solve for x
    x = 8,742,709.53/2,942.39
  6. Step 6: Final answer
    x = 2,971.30

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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.