Home / 20,403.78-28,157.27-11,450.45

Finding the Fourth Proportional to 20,403.78, 28,157.27 and 11,450.45

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Solution

The fourth proportional to 20,403.78, 28,157.27 and 11,450.45 is: 15,801.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,403.78 : 28,157.27 = 11,450.45 : x
  2. Step 2: Convert to fraction form
    20,403.78/28,157.27 = 11,450.45/x
  3. Step 3: Cross multiply
    20,403.78x = 28,157.27 × 11,450.45
  4. Step 4: Simplify right side
    20,403.78x = 322,413,214.23
  5. Step 5: Solve for x
    x = 322,413,214.23/20,403.78
  6. Step 6: Final answer
    x = 15,801.64

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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.