Home / 20,418.69-28,090.31-19,543.89

Finding the Fourth Proportional to 20,418.69, 28,090.31 and 19,543.89

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Solution

The fourth proportional to 20,418.69, 28,090.31 and 19,543.89 is: 26,886.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,418.69 : 28,090.31 = 19,543.89 : x
  2. Step 2: Convert to fraction form
    20,418.69/28,090.31 = 19,543.89/x
  3. Step 3: Cross multiply
    20,418.69x = 28,090.31 × 19,543.89
  4. Step 4: Simplify right side
    20,418.69x = 548,993,830.99
  5. Step 5: Solve for x
    x = 548,993,830.99/20,418.69
  6. Step 6: Final answer
    x = 26,886.83

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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.