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Finding the Fourth Proportional to 15,090.23, 20,822.60 and 8,374.92

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Solution

The fourth proportional to 15,090.23, 20,822.60 and 8,374.92 is: 11,556.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,090.23 : 20,822.60 = 8,374.92 : x
  2. Step 2: Convert to fraction form
    15,090.23/20,822.60 = 8,374.92/x
  3. Step 3: Cross multiply
    15,090.23x = 20,822.60 × 8,374.92
  4. Step 4: Simplify right side
    15,090.23x = 174,387,609.19
  5. Step 5: Solve for x
    x = 174,387,609.19/15,090.23
  6. Step 6: Final answer
    x = 11,556.33

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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.