Home / 12,122.28-18,181.98-3,802.50

Finding the Fourth Proportional to 12,122.28, 18,181.98 and 3,802.50

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Solution

The fourth proportional to 12,122.28, 18,181.98 and 3,802.50 is: 5,703.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,122.28 : 18,181.98 = 3,802.50 : x
  2. Step 2: Convert to fraction form
    12,122.28/18,181.98 = 3,802.50/x
  3. Step 3: Cross multiply
    12,122.28x = 18,181.98 × 3,802.50
  4. Step 4: Simplify right side
    12,122.28x = 69,136,978.95
  5. Step 5: Solve for x
    x = 69,136,978.95/12,122.28
  6. Step 6: Final answer
    x = 5,703.30

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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.