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Finding the Fourth Proportional to 9,455.78, 13,054.60 and 8,404.80

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Solution

The fourth proportional to 9,455.78, 13,054.60 and 8,404.80 is: 11,603.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,455.78 : 13,054.60 = 8,404.80 : x
  2. Step 2: Convert to fraction form
    9,455.78/13,054.60 = 8,404.80/x
  3. Step 3: Cross multiply
    9,455.78x = 13,054.60 × 8,404.80
  4. Step 4: Simplify right side
    9,455.78x = 109,721,281.07
  5. Step 5: Solve for x
    x = 109,721,281.07/9,455.78
  6. Step 6: Final answer
    x = 11,603.63

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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.