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Finding the Fourth Proportional to 19,078, 26,326.56 and 11,118.88

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Solution

The fourth proportional to 19,078, 26,326.56 and 11,118.88 is: 15,343.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,078 : 26,326.56 = 11,118.88 : x
  2. Step 2: Convert to fraction form
    19,078/26,326.56 = 11,118.88/x
  3. Step 3: Cross multiply
    19,078x = 26,326.56 × 11,118.88
  4. Step 4: Simplify right side
    19,078x = 292,721,861.45
  5. Step 5: Solve for x
    x = 292,721,861.45/19,078
  6. Step 6: Final answer
    x = 15,343.42

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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.