Home / 20,771.63-28,665.91-11,820.41

Finding the Fourth Proportional to 20,771.63, 28,665.91 and 11,820.41

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Solution

The fourth proportional to 20,771.63, 28,665.91 and 11,820.41 is: 16,312.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,771.63 : 28,665.91 = 11,820.41 : x
  2. Step 2: Convert to fraction form
    20,771.63/28,665.91 = 11,820.41/x
  3. Step 3: Cross multiply
    20,771.63x = 28,665.91 × 11,820.41
  4. Step 4: Simplify right side
    20,771.63x = 338,842,809.22
  5. Step 5: Solve for x
    x = 338,842,809.22/20,771.63
  6. Step 6: Final answer
    x = 16,312.77

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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.