Home / 3,561.81-4,915.37-1,989.90

Finding the Fourth Proportional to 3,561.81, 4,915.37 and 1,989.90

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Solution

The fourth proportional to 3,561.81, 4,915.37 and 1,989.90 is: 2,746.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,561.81 : 4,915.37 = 1,989.90 : x
  2. Step 2: Convert to fraction form
    3,561.81/4,915.37 = 1,989.90/x
  3. Step 3: Cross multiply
    3,561.81x = 4,915.37 × 1,989.90
  4. Step 4: Simplify right side
    3,561.81x = 9,781,084.81
  5. Step 5: Solve for x
    x = 9,781,084.81/3,561.81
  6. Step 6: Final answer
    x = 2,746.10

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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.