Home / 20,720.94-28,595.12-11,768.66

Finding the Fourth Proportional to 20,720.94, 28,595.12 and 11,768.66

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Solution

The fourth proportional to 20,720.94, 28,595.12 and 11,768.66 is: 16,240.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,720.94 : 28,595.12 = 11,768.66 : x
  2. Step 2: Convert to fraction form
    20,720.94/28,595.12 = 11,768.66/x
  3. Step 3: Cross multiply
    20,720.94x = 28,595.12 × 11,768.66
  4. Step 4: Simplify right side
    20,720.94x = 336,526,244.94
  5. Step 5: Solve for x
    x = 336,526,244.94/20,720.94
  6. Step 6: Final answer
    x = 16,240.88

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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.