Home / 5,405.31-8,111.61-2,117.99

Finding the Fourth Proportional to 5,405.31, 8,111.61 and 2,117.99

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Solution

The fourth proportional to 5,405.31, 8,111.61 and 2,117.99 is: 3,178.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,405.31 : 8,111.61 = 2,117.99 : x
  2. Step 2: Convert to fraction form
    5,405.31/8,111.61 = 2,117.99/x
  3. Step 3: Cross multiply
    5,405.31x = 8,111.61 × 2,117.99
  4. Step 4: Simplify right side
    5,405.31x = 17,180,329.14
  5. Step 5: Solve for x
    x = 17,180,329.14/5,405.31
  6. Step 6: Final answer
    x = 3,178.42

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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.