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Finding the Fourth Proportional to 11,878.58, 17,812.68 and 5,640.38

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Solution

The fourth proportional to 11,878.58, 17,812.68 and 5,640.38 is: 8,458.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,878.58 : 17,812.68 = 5,640.38 : x
  2. Step 2: Convert to fraction form
    11,878.58/17,812.68 = 5,640.38/x
  3. Step 3: Cross multiply
    11,878.58x = 17,812.68 × 5,640.38
  4. Step 4: Simplify right side
    11,878.58x = 100,470,284.02
  5. Step 5: Solve for x
    x = 100,470,284.02/11,878.58
  6. Step 6: Final answer
    x = 8,458.11

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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.