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Finding the Fourth Proportional to 7,909.65, 11,848.68 and 4,788.01

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Solution

The fourth proportional to 7,909.65, 11,848.68 and 4,788.01 is: 7,172.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,909.65 : 11,848.68 = 4,788.01 : x
  2. Step 2: Convert to fraction form
    7,909.65/11,848.68 = 4,788.01/x
  3. Step 3: Cross multiply
    7,909.65x = 11,848.68 × 4,788.01
  4. Step 4: Simplify right side
    7,909.65x = 56,731,613.14
  5. Step 5: Solve for x
    x = 56,731,613.14/7,909.65
  6. Step 6: Final answer
    x = 7,172.46

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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.