Home / 15,615.90-21,550.14-8,542.44

Finding the Fourth Proportional to 15,615.90, 21,550.14 and 8,542.44

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Solution

The fourth proportional to 15,615.90, 21,550.14 and 8,542.44 is: 11,788.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,615.90 : 21,550.14 = 8,542.44 : x
  2. Step 2: Convert to fraction form
    15,615.90/21,550.14 = 8,542.44/x
  3. Step 3: Cross multiply
    15,615.90x = 21,550.14 × 8,542.44
  4. Step 4: Simplify right side
    15,615.90x = 184,090,777.94
  5. Step 5: Solve for x
    x = 184,090,777.94/15,615.90
  6. Step 6: Final answer
    x = 11,788.68

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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.