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Finding the Fourth Proportional to 8,671.88, 11,968.61 and 5,316.54

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Solution

The fourth proportional to 8,671.88, 11,968.61 and 5,316.54 is: 7,337.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,671.88 : 11,968.61 = 5,316.54 : x
  2. Step 2: Convert to fraction form
    8,671.88/11,968.61 = 5,316.54/x
  3. Step 3: Cross multiply
    8,671.88x = 11,968.61 × 5,316.54
  4. Step 4: Simplify right side
    8,671.88x = 63,631,567.23
  5. Step 5: Solve for x
    x = 63,631,567.23/8,671.88
  6. Step 6: Final answer
    x = 7,337.69

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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.