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Finding the Fourth Proportional to 13,500.30, 18,641.86 and 8,472.90

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Solution

The fourth proportional to 13,500.30, 18,641.86 and 8,472.90 is: 11,699.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,500.30 : 18,641.86 = 8,472.90 : x
  2. Step 2: Convert to fraction form
    13,500.30/18,641.86 = 8,472.90/x
  3. Step 3: Cross multiply
    13,500.30x = 18,641.86 × 8,472.90
  4. Step 4: Simplify right side
    13,500.30x = 157,950,615.59
  5. Step 5: Solve for x
    x = 157,950,615.59/13,500.30
  6. Step 6: Final answer
    x = 11,699.79

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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.