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Finding the Fourth Proportional to 54,981.51, 82,472.13 and 13,428.51

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Solution

The fourth proportional to 54,981.51, 82,472.13 and 13,428.51 is: 20,142.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,981.51 : 82,472.13 = 13,428.51 : x
  2. Step 2: Convert to fraction form
    54,981.51/82,472.13 = 13,428.51/x
  3. Step 3: Cross multiply
    54,981.51x = 82,472.13 × 13,428.51
  4. Step 4: Simplify right side
    54,981.51x = 1,107,477,822.43
  5. Step 5: Solve for x
    x = 1,107,477,822.43/54,981.51
  6. Step 6: Final answer
    x = 20,142.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.