Home / 20,839.03-28,757.91-11,408.20

Finding the Fourth Proportional to 20,839.03, 28,757.91 and 11,408.20

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Solution

The fourth proportional to 20,839.03, 28,757.91 and 11,408.20 is: 15,743.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,839.03 : 28,757.91 = 11,408.20 : x
  2. Step 2: Convert to fraction form
    20,839.03/28,757.91 = 11,408.20/x
  3. Step 3: Cross multiply
    20,839.03x = 28,757.91 × 11,408.20
  4. Step 4: Simplify right side
    20,839.03x = 328,075,988.86
  5. Step 5: Solve for x
    x = 328,075,988.86/20,839.03
  6. Step 6: Final answer
    x = 15,743.34

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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.