Home / 54,381.36-81,539.64-18,831

Finding the Fourth Proportional to 54,381.36, 81,539.64 and 18,831

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Solution

The fourth proportional to 54,381.36, 81,539.64 and 18,831 is: 28,235.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,381.36 : 81,539.64 = 18,831 : x
  2. Step 2: Convert to fraction form
    54,381.36/81,539.64 = 18,831/x
  3. Step 3: Cross multiply
    54,381.36x = 81,539.64 × 18,831
  4. Step 4: Simplify right side
    54,381.36x = 1,535,472,960.84
  5. Step 5: Solve for x
    x = 1,535,472,960.84/54,381.36
  6. Step 6: Final answer
    x = 28,235.28

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1.5x scale

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.