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Finding the Fourth Proportional to 25,670.85, 38,509.94 and 7,902.99

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Solution

The fourth proportional to 25,670.85, 38,509.94 and 7,902.99 is: 11,855.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,670.85 : 38,509.94 = 7,902.99 : x
  2. Step 2: Convert to fraction form
    25,670.85/38,509.94 = 7,902.99/x
  3. Step 3: Cross multiply
    25,670.85x = 38,509.94 × 7,902.99
  4. Step 4: Simplify right side
    25,670.85x = 304,343,727.48
  5. Step 5: Solve for x
    x = 304,343,727.48/25,670.85
  6. Step 6: Final answer
    x = 11,855.61

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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.