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Finding the Fourth Proportional to 18,954.81, 26,157.74 and 10,998.99

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Solution

The fourth proportional to 18,954.81, 26,157.74 and 10,998.99 is: 15,178.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,954.81 : 26,157.74 = 10,998.99 : x
  2. Step 2: Convert to fraction form
    18,954.81/26,157.74 = 10,998.99/x
  3. Step 3: Cross multiply
    18,954.81x = 26,157.74 × 10,998.99
  4. Step 4: Simplify right side
    18,954.81x = 287,708,665.69
  5. Step 5: Solve for x
    x = 287,708,665.69/18,954.81
  6. Step 6: Final answer
    x = 15,178.66

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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.