Home / 2,136.16-2,943.60-1,389.28

Finding the Fourth Proportional to 2,136.16, 2,943.60 and 1,389.28

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Solution

The fourth proportional to 2,136.16, 2,943.60 and 1,389.28 is: 1,914.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,136.16 : 2,943.60 = 1,389.28 : x
  2. Step 2: Convert to fraction form
    2,136.16/2,943.60 = 1,389.28/x
  3. Step 3: Cross multiply
    2,136.16x = 2,943.60 × 1,389.28
  4. Step 4: Simplify right side
    2,136.16x = 4,089,484.61
  5. Step 5: Solve for x
    x = 4,089,484.61/2,136.16
  6. Step 6: Final answer
    x = 1,914.41

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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.