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Finding the Fourth Proportional to 8,572.75, 11,823.86 and 7,379.70

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Solution

The fourth proportional to 8,572.75, 11,823.86 and 7,379.70 is: 10,178.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,572.75 : 11,823.86 = 7,379.70 : x
  2. Step 2: Convert to fraction form
    8,572.75/11,823.86 = 7,379.70/x
  3. Step 3: Cross multiply
    8,572.75x = 11,823.86 × 7,379.70
  4. Step 4: Simplify right side
    8,572.75x = 87,256,505.50
  5. Step 5: Solve for x
    x = 87,256,505.50/8,572.75
  6. Step 6: Final answer
    x = 10,178.35

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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.