Home / 20,428.98-28,194.74-11,476.99

Finding the Fourth Proportional to 20,428.98, 28,194.74 and 11,476.99

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Solution

The fourth proportional to 20,428.98, 28,194.74 and 11,476.99 is: 15,839.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,428.98 : 28,194.74 = 11,476.99 : x
  2. Step 2: Convert to fraction form
    20,428.98/28,194.74 = 11,476.99/x
  3. Step 3: Cross multiply
    20,428.98x = 28,194.74 × 11,476.99
  4. Step 4: Simplify right side
    20,428.98x = 323,590,749.03
  5. Step 5: Solve for x
    x = 323,590,749.03/20,428.98
  6. Step 6: Final answer
    x = 15,839.79

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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.