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Finding the Fourth Proportional to 11,876.80, 17,818.08 and 4,085.68

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Solution

The fourth proportional to 11,876.80, 17,818.08 and 4,085.68 is: 6,129.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,876.80 : 17,818.08 = 4,085.68 : x
  2. Step 2: Convert to fraction form
    11,876.80/17,818.08 = 4,085.68/x
  3. Step 3: Cross multiply
    11,876.80x = 17,818.08 × 4,085.68
  4. Step 4: Simplify right side
    11,876.80x = 72,798,973.09
  5. Step 5: Solve for x
    x = 72,798,973.09/11,876.80
  6. Step 6: Final answer
    x = 6,129.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.