Home / 20,795.78-28,730.74-19,771.63

Finding the Fourth Proportional to 20,795.78, 28,730.74 and 19,771.63

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Solution

The fourth proportional to 20,795.78, 28,730.74 and 19,771.63 is: 27,315.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,795.78 : 28,730.74 = 19,771.63 : x
  2. Step 2: Convert to fraction form
    20,795.78/28,730.74 = 19,771.63/x
  3. Step 3: Cross multiply
    20,795.78x = 28,730.74 × 19,771.63
  4. Step 4: Simplify right side
    20,795.78x = 568,053,560.91
  5. Step 5: Solve for x
    x = 568,053,560.91/20,795.78
  6. Step 6: Final answer
    x = 27,315.82

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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.