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Finding the Fourth Proportional to 8,881.31, 13,318.09 and 4,720.31

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Solution

The fourth proportional to 8,881.31, 13,318.09 and 4,720.31 is: 7,078.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,881.31 : 13,318.09 = 4,720.31 : x
  2. Step 2: Convert to fraction form
    8,881.31/13,318.09 = 4,720.31/x
  3. Step 3: Cross multiply
    8,881.31x = 13,318.09 × 4,720.31
  4. Step 4: Simplify right side
    8,881.31x = 62,865,513.41
  5. Step 5: Solve for x
    x = 62,865,513.41/8,881.31
  6. Step 6: Final answer
    x = 7,078.41

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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.