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Finding the Fourth Proportional to 18,653.61, 25,747.41 and 14,902.89

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Solution

The fourth proportional to 18,653.61, 25,747.41 and 14,902.89 is: 20,570.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,653.61 : 25,747.41 = 14,902.89 : x
  2. Step 2: Convert to fraction form
    18,653.61/25,747.41 = 14,902.89/x
  3. Step 3: Cross multiply
    18,653.61x = 25,747.41 × 14,902.89
  4. Step 4: Simplify right side
    18,653.61x = 383,710,819.01
  5. Step 5: Solve for x
    x = 383,710,819.01/18,653.61
  6. Step 6: Final answer
    x = 20,570.32

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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.