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Finding the Fourth Proportional to 25,688.63, 38,532.94 and 7,220.63

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Solution

The fourth proportional to 25,688.63, 38,532.94 and 7,220.63 is: 10,830.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,688.63 : 38,532.94 = 7,220.63 : x
  2. Step 2: Convert to fraction form
    25,688.63/38,532.94 = 7,220.63/x
  3. Step 3: Cross multiply
    25,688.63x = 38,532.94 × 7,220.63
  4. Step 4: Simplify right side
    25,688.63x = 278,231,891.84
  5. Step 5: Solve for x
    x = 278,231,891.84/25,688.63
  6. Step 6: Final answer
    x = 10,830.94

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.