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Finding the Fourth Proportional to 19,381.59, 26,733.87 and 11,418.21

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Solution

The fourth proportional to 19,381.59, 26,733.87 and 11,418.21 is: 15,749.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,381.59 : 26,733.87 = 11,418.21 : x
  2. Step 2: Convert to fraction form
    19,381.59/26,733.87 = 11,418.21/x
  3. Step 3: Cross multiply
    19,381.59x = 26,733.87 × 11,418.21
  4. Step 4: Simplify right side
    19,381.59x = 305,252,941.77
  5. Step 5: Solve for x
    x = 305,252,941.77/19,381.59
  6. Step 6: Final answer
    x = 15,749.63

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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.