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Finding the Fourth Proportional to 19,081, 26,330.70 and 11,121.88

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Solution

The fourth proportional to 19,081, 26,330.70 and 11,121.88 is: 15,347.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,081 : 26,330.70 = 11,121.88 : x
  2. Step 2: Convert to fraction form
    19,081/26,330.70 = 11,121.88/x
  3. Step 3: Cross multiply
    19,081x = 26,330.70 × 11,121.88
  4. Step 4: Simplify right side
    19,081x = 292,846,885.72
  5. Step 5: Solve for x
    x = 292,846,885.72/19,081
  6. Step 6: Final answer
    x = 15,347.56

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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.