Home / 39,905.10-55,069.38-22,000.80

Finding the Fourth Proportional to 39,905.10, 55,069.38 and 22,000.80

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Solution

The fourth proportional to 39,905.10, 55,069.38 and 22,000.80 is: 30,361.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,905.10 : 55,069.38 = 22,000.80 : x
  2. Step 2: Convert to fraction form
    39,905.10/55,069.38 = 22,000.80/x
  3. Step 3: Cross multiply
    39,905.10x = 55,069.38 × 22,000.80
  4. Step 4: Simplify right side
    39,905.10x = 1,211,570,415.50
  5. Step 5: Solve for x
    x = 1,211,570,415.50/39,905.10
  6. Step 6: Final answer
    x = 30,361.29

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1.5x scale

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.