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Finding the Fourth Proportional to 2,139.33, 2,926.86 and 2,130.09

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Solution

The fourth proportional to 2,139.33, 2,926.86 and 2,130.09 is: 2,914.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,139.33 : 2,926.86 = 2,130.09 : x
  2. Step 2: Convert to fraction form
    2,139.33/2,926.86 = 2,130.09/x
  3. Step 3: Cross multiply
    2,139.33x = 2,926.86 × 2,130.09
  4. Step 4: Simplify right side
    2,139.33x = 6,234,475.22
  5. Step 5: Solve for x
    x = 6,234,475.22/2,139.33
  6. Step 6: Final answer
    x = 2,914.22

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These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.