Home / 20,518.75-28,374.20-19,590.49

Finding the Fourth Proportional to 20,518.75, 28,374.20 and 19,590.49

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Solution

The fourth proportional to 20,518.75, 28,374.20 and 19,590.49 is: 27,090.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,518.75 : 28,374.20 = 19,590.49 : x
  2. Step 2: Convert to fraction form
    20,518.75/28,374.20 = 19,590.49/x
  3. Step 3: Cross multiply
    20,518.75x = 28,374.20 × 19,590.49
  4. Step 4: Simplify right side
    20,518.75x = 555,864,481.36
  5. Step 5: Solve for x
    x = 555,864,481.36/20,518.75
  6. Step 6: Final answer
    x = 27,090.56

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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.