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Finding the Fourth Proportional to 7,886.78, 11,809.64 and 7,653.04

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Solution

The fourth proportional to 7,886.78, 11,809.64 and 7,653.04 is: 11,459.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,886.78 : 11,809.64 = 7,653.04 : x
  2. Step 2: Convert to fraction form
    7,886.78/11,809.64 = 7,653.04/x
  3. Step 3: Cross multiply
    7,886.78x = 11,809.64 × 7,653.04
  4. Step 4: Simplify right side
    7,886.78x = 90,379,636.91
  5. Step 5: Solve for x
    x = 90,379,636.91/7,886.78
  6. Step 6: Final answer
    x = 11,459.64

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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.