Home / 10,905.90-16,361.26-3,980.40

Finding the Fourth Proportional to 10,905.90, 16,361.26 and 3,980.40

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Solution

The fourth proportional to 10,905.90, 16,361.26 and 3,980.40 is: 5,971.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,905.90 : 16,361.26 = 3,980.40 : x
  2. Step 2: Convert to fraction form
    10,905.90/16,361.26 = 3,980.40/x
  3. Step 3: Cross multiply
    10,905.90x = 16,361.26 × 3,980.40
  4. Step 4: Simplify right side
    10,905.90x = 65,124,359.30
  5. Step 5: Solve for x
    x = 65,124,359.30/10,905.90
  6. Step 6: Final answer
    x = 5,971.48

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1.5x scale

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.