Home / 12,455.55-17,188.50-8,212.77

Finding the Fourth Proportional to 12,455.55, 17,188.50 and 8,212.77

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Solution

The fourth proportional to 12,455.55, 17,188.50 and 8,212.77 is: 11,333.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,455.55 : 17,188.50 = 8,212.77 : x
  2. Step 2: Convert to fraction form
    12,455.55/17,188.50 = 8,212.77/x
  3. Step 3: Cross multiply
    12,455.55x = 17,188.50 × 8,212.77
  4. Step 4: Simplify right side
    12,455.55x = 141,165,197.15
  5. Step 5: Solve for x
    x = 141,165,197.15/12,455.55
  6. Step 6: Final answer
    x = 11,333.52

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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.