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Finding the Fourth Proportional to 28,400.77, 39,194.77 and 15,653.93

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Solution

The fourth proportional to 28,400.77, 39,194.77 and 15,653.93 is: 21,603.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,400.77 : 39,194.77 = 15,653.93 : x
  2. Step 2: Convert to fraction form
    28,400.77/39,194.77 = 15,653.93/x
  3. Step 3: Cross multiply
    28,400.77x = 39,194.77 × 15,653.93
  4. Step 4: Simplify right side
    28,400.77x = 613,552,146.81
  5. Step 5: Solve for x
    x = 613,552,146.81/28,400.77
  6. Step 6: Final answer
    x = 21,603.37

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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.