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Finding the Fourth Proportional to 28,185.36, 38,895.84 and 15,609.84

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Solution

The fourth proportional to 28,185.36, 38,895.84 and 15,609.84 is: 21,541.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,185.36 : 38,895.84 = 15,609.84 : x
  2. Step 2: Convert to fraction form
    28,185.36/38,895.84 = 15,609.84/x
  3. Step 3: Cross multiply
    28,185.36x = 38,895.84 × 15,609.84
  4. Step 4: Simplify right side
    28,185.36x = 607,157,839.07
  5. Step 5: Solve for x
    x = 607,157,839.07/28,185.36
  6. Step 6: Final answer
    x = 21,541.60

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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.