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Finding the Fourth Proportional to 14,172.55, 19,555.15 and 8,203.86

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Solution

The fourth proportional to 14,172.55, 19,555.15 and 8,203.86 is: 11,319.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,172.55 : 19,555.15 = 8,203.86 : x
  2. Step 2: Convert to fraction form
    14,172.55/19,555.15 = 8,203.86/x
  3. Step 3: Cross multiply
    14,172.55x = 19,555.15 × 8,203.86
  4. Step 4: Simplify right side
    14,172.55x = 160,427,712.88
  5. Step 5: Solve for x
    x = 160,427,712.88/14,172.55
  6. Step 6: Final answer
    x = 11,319.61

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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.