Home / 20,440.72-28,210.62-11,488.60

Finding the Fourth Proportional to 20,440.72, 28,210.62 and 11,488.60

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Solution

The fourth proportional to 20,440.72, 28,210.62 and 11,488.60 is: 15,855.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,440.72 : 28,210.62 = 11,488.60 : x
  2. Step 2: Convert to fraction form
    20,440.72/28,210.62 = 11,488.60/x
  3. Step 3: Cross multiply
    20,440.72x = 28,210.62 × 11,488.60
  4. Step 4: Simplify right side
    20,440.72x = 324,100,528.93
  5. Step 5: Solve for x
    x = 324,100,528.93/20,440.72
  6. Step 6: Final answer
    x = 15,855.63

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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.