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Finding the Fourth Proportional to 8,881.50, 13,318.37 and 4,720.50

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Solution

The fourth proportional to 8,881.50, 13,318.37 and 4,720.50 is: 7,078.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,881.50 : 13,318.37 = 4,720.50 : x
  2. Step 2: Convert to fraction form
    8,881.50/13,318.37 = 4,720.50/x
  3. Step 3: Cross multiply
    8,881.50x = 13,318.37 × 4,720.50
  4. Step 4: Simplify right side
    8,881.50x = 62,869,341.98
  5. Step 5: Solve for x
    x = 62,869,341.98/8,881.50
  6. Step 6: Final answer
    x = 7,078.69

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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.