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Finding the Fourth Proportional to 28,185, 38,893.74 and 15,608.76

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Solution

The fourth proportional to 28,185, 38,893.74 and 15,608.76 is: 21,539.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,185 : 38,893.74 = 15,608.76 : x
  2. Step 2: Convert to fraction form
    28,185/38,893.74 = 15,608.76/x
  3. Step 3: Cross multiply
    28,185x = 38,893.74 × 15,608.76
  4. Step 4: Simplify right side
    28,185x = 607,083,053.16
  5. Step 5: Solve for x
    x = 607,083,053.16/28,185
  6. Step 6: Final answer
    x = 21,539.22

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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.