Home / 20,907.19-28,847.59-12,408.11

Finding the Fourth Proportional to 20,907.19, 28,847.59 and 12,408.11

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Solution

The fourth proportional to 20,907.19, 28,847.59 and 12,408.11 is: 17,120.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,907.19 : 28,847.59 = 12,408.11 : x
  2. Step 2: Convert to fraction form
    20,907.19/28,847.59 = 12,408.11/x
  3. Step 3: Cross multiply
    20,907.19x = 28,847.59 × 12,408.11
  4. Step 4: Simplify right side
    20,907.19x = 357,944,153.80
  5. Step 5: Solve for x
    x = 357,944,153.80/20,907.19
  6. Step 6: Final answer
    x = 17,120.63

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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.