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Finding the Fourth Proportional to 8,636.40, 11,913.75 and 7,455.42

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Solution

The fourth proportional to 8,636.40, 11,913.75 and 7,455.42 is: 10,284.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,636.40 : 11,913.75 = 7,455.42 : x
  2. Step 2: Convert to fraction form
    8,636.40/11,913.75 = 7,455.42/x
  3. Step 3: Cross multiply
    8,636.40x = 11,913.75 × 7,455.42
  4. Step 4: Simplify right side
    8,636.40x = 88,822,010.03
  5. Step 5: Solve for x
    x = 88,822,010.03/8,636.40
  6. Step 6: Final answer
    x = 10,284.61

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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.