Home / 20,876.90-28,821.21-14,198.18

Finding the Fourth Proportional to 20,876.90, 28,821.21 and 14,198.18

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Solution

The fourth proportional to 20,876.90, 28,821.21 and 14,198.18 is: 19,601.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,876.90 : 28,821.21 = 14,198.18 : x
  2. Step 2: Convert to fraction form
    20,876.90/28,821.21 = 14,198.18/x
  3. Step 3: Cross multiply
    20,876.90x = 28,821.21 × 14,198.18
  4. Step 4: Simplify right side
    20,876.90x = 409,208,727.40
  5. Step 5: Solve for x
    x = 409,208,727.40/20,876.90
  6. Step 6: Final answer
    x = 19,601.03

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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.