Home / 54,428.85-81,641.43-21,156.39

Finding the Fourth Proportional to 54,428.85, 81,641.43 and 21,156.39

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Solution

The fourth proportional to 54,428.85, 81,641.43 and 21,156.39 is: 31,733.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,428.85 : 81,641.43 = 21,156.39 : x
  2. Step 2: Convert to fraction form
    54,428.85/81,641.43 = 21,156.39/x
  3. Step 3: Cross multiply
    54,428.85x = 81,641.43 × 21,156.39
  4. Step 4: Simplify right side
    54,428.85x = 1,727,237,933.24
  5. Step 5: Solve for x
    x = 1,727,237,933.24/54,428.85
  6. Step 6: Final answer
    x = 31,733.87

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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.