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Finding the Fourth Proportional to 12,573.88, 17,348.78 and 8,379.32

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Solution

The fourth proportional to 12,573.88, 17,348.78 and 8,379.32 is: 11,561.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,573.88 : 17,348.78 = 8,379.32 : x
  2. Step 2: Convert to fraction form
    12,573.88/17,348.78 = 8,379.32/x
  3. Step 3: Cross multiply
    12,573.88x = 17,348.78 × 8,379.32
  4. Step 4: Simplify right side
    12,573.88x = 145,370,979.23
  5. Step 5: Solve for x
    x = 145,370,979.23/12,573.88
  6. Step 6: Final answer
    x = 11,561.35

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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.