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Finding the Fourth Proportional to 13,899.10, 20,847.90 and 3,510.94

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Solution

The fourth proportional to 13,899.10, 20,847.90 and 3,510.94 is: 5,266.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,899.10 : 20,847.90 = 3,510.94 : x
  2. Step 2: Convert to fraction form
    13,899.10/20,847.90 = 3,510.94/x
  3. Step 3: Cross multiply
    13,899.10x = 20,847.90 × 3,510.94
  4. Step 4: Simplify right side
    13,899.10x = 73,195,726.03
  5. Step 5: Solve for x
    x = 73,195,726.03/13,899.10
  6. Step 6: Final answer
    x = 5,266.22

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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.