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Finding the Fourth Proportional to 18,998.78, 26,193.72 and 13,019.76

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Solution

The fourth proportional to 18,998.78, 26,193.72 and 13,019.76 is: 17,950.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,998.78 : 26,193.72 = 13,019.76 : x
  2. Step 2: Convert to fraction form
    18,998.78/26,193.72 = 13,019.76/x
  3. Step 3: Cross multiply
    18,998.78x = 26,193.72 × 13,019.76
  4. Step 4: Simplify right side
    18,998.78x = 341,035,947.91
  5. Step 5: Solve for x
    x = 341,035,947.91/18,998.78
  6. Step 6: Final answer
    x = 17,950.41

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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.