Home / 5,428.13-8,143.29-1,917.99

Finding the Fourth Proportional to 5,428.13, 8,143.29 and 1,917.99

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Solution

The fourth proportional to 5,428.13, 8,143.29 and 1,917.99 is: 2,877.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,428.13 : 8,143.29 = 1,917.99 : x
  2. Step 2: Convert to fraction form
    5,428.13/8,143.29 = 1,917.99/x
  3. Step 3: Cross multiply
    5,428.13x = 8,143.29 × 1,917.99
  4. Step 4: Simplify right side
    5,428.13x = 15,618,748.79
  5. Step 5: Solve for x
    x = 15,618,748.79/5,428.13
  6. Step 6: Final answer
    x = 2,877.37

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.