Home / 20,662.13-28,513.93-11,230.72

Finding the Fourth Proportional to 20,662.13, 28,513.93 and 11,230.72

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Solution

The fourth proportional to 20,662.13, 28,513.93 and 11,230.72 is: 15,498.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,662.13 : 28,513.93 = 11,230.72 : x
  2. Step 2: Convert to fraction form
    20,662.13/28,513.93 = 11,230.72/x
  3. Step 3: Cross multiply
    20,662.13x = 28,513.93 × 11,230.72
  4. Step 4: Simplify right side
    20,662.13x = 320,231,821.36
  5. Step 5: Solve for x
    x = 320,231,821.36/20,662.13
  6. Step 6: Final answer
    x = 15,498.49

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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.