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Finding the Fourth Proportional to 8,720.88, 12,036 and 5,363.82

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Solution

The fourth proportional to 8,720.88, 12,036 and 5,363.82 is: 7,402.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720.88 : 12,036 = 5,363.82 : x
  2. Step 2: Convert to fraction form
    8,720.88/12,036 = 5,363.82/x
  3. Step 3: Cross multiply
    8,720.88x = 12,036 × 5,363.82
  4. Step 4: Simplify right side
    8,720.88x = 64,558,937.52
  5. Step 5: Solve for x
    x = 64,558,937.52/8,720.88
  6. Step 6: Final answer
    x = 7,402.80

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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.