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Finding the Fourth Proportional to 12,866.55, 17,741.73 and 8,381.98

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Solution

The fourth proportional to 12,866.55, 17,741.73 and 8,381.98 is: 11,557.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,866.55 : 17,741.73 = 8,381.98 : x
  2. Step 2: Convert to fraction form
    12,866.55/17,741.73 = 8,381.98/x
  3. Step 3: Cross multiply
    12,866.55x = 17,741.73 × 8,381.98
  4. Step 4: Simplify right side
    12,866.55x = 148,710,879.63
  5. Step 5: Solve for x
    x = 148,710,879.63/12,866.55
  6. Step 6: Final answer
    x = 11,557.95

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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.