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Finding the Fourth Proportional to 8,543.70, 11,789.73 and 4,909.86

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Solution

The fourth proportional to 8,543.70, 11,789.73 and 4,909.86 is: 6,775.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,543.70 : 11,789.73 = 4,909.86 : x
  2. Step 2: Convert to fraction form
    8,543.70/11,789.73 = 4,909.86/x
  3. Step 3: Cross multiply
    8,543.70x = 11,789.73 × 4,909.86
  4. Step 4: Simplify right side
    8,543.70x = 57,885,923.74
  5. Step 5: Solve for x
    x = 57,885,923.74/8,543.70
  6. Step 6: Final answer
    x = 6,775.28

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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.