Home / 20,616.09-28,450.62-12,655.41

Finding the Fourth Proportional to 20,616.09, 28,450.62 and 12,655.41

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Solution

The fourth proportional to 20,616.09, 28,450.62 and 12,655.41 is: 17,464.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,616.09 : 28,450.62 = 12,655.41 : x
  2. Step 2: Convert to fraction form
    20,616.09/28,450.62 = 12,655.41/x
  3. Step 3: Cross multiply
    20,616.09x = 28,450.62 × 12,655.41
  4. Step 4: Simplify right side
    20,616.09x = 360,054,260.85
  5. Step 5: Solve for x
    x = 360,054,260.85/20,616.09
  6. Step 6: Final answer
    x = 17,464.72

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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.