Home / 54,387.84-81,537.48-21,090.72

Finding the Fourth Proportional to 54,387.84, 81,537.48 and 21,090.72

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Solution

The fourth proportional to 54,387.84, 81,537.48 and 21,090.72 is: 31,618.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,387.84 : 81,537.48 = 21,090.72 : x
  2. Step 2: Convert to fraction form
    54,387.84/81,537.48 = 21,090.72/x
  3. Step 3: Cross multiply
    54,387.84x = 81,537.48 × 21,090.72
  4. Step 4: Simplify right side
    54,387.84x = 1,719,684,160.19
  5. Step 5: Solve for x
    x = 1,719,684,160.19/54,387.84
  6. Step 6: Final answer
    x = 31,618.91

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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.