Home / 20,911.93-28,845.77-12,408.44

Finding the Fourth Proportional to 20,911.93, 28,845.77 and 12,408.44

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Solution

The fourth proportional to 20,911.93, 28,845.77 and 12,408.44 is: 17,116.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,911.93 : 28,845.77 = 12,408.44 : x
  2. Step 2: Convert to fraction form
    20,911.93/28,845.77 = 12,408.44/x
  3. Step 3: Cross multiply
    20,911.93x = 28,845.77 × 12,408.44
  4. Step 4: Simplify right side
    20,911.93x = 357,931,109.43
  5. Step 5: Solve for x
    x = 357,931,109.43/20,911.93
  6. Step 6: Final answer
    x = 17,116.12

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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.