Home / 5,155.94-7,115.64-2,918.53

Finding the Fourth Proportional to 5,155.94, 7,115.64 and 2,918.53

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Solution

The fourth proportional to 5,155.94, 7,115.64 and 2,918.53 is: 4,027.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,155.94 : 7,115.64 = 2,918.53 : x
  2. Step 2: Convert to fraction form
    5,155.94/7,115.64 = 2,918.53/x
  3. Step 3: Cross multiply
    5,155.94x = 7,115.64 × 2,918.53
  4. Step 4: Simplify right side
    5,155.94x = 20,767,208.81
  5. Step 5: Solve for x
    x = 20,767,208.81/5,155.94
  6. Step 6: Final answer
    x = 4,027.82

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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.