Home / 39,286.70-54,214.59-21,381.32

Finding the Fourth Proportional to 39,286.70, 54,214.59 and 21,381.32

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Solution

The fourth proportional to 39,286.70, 54,214.59 and 21,381.32 is: 29,505.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,286.70 : 54,214.59 = 21,381.32 : x
  2. Step 2: Convert to fraction form
    39,286.70/54,214.59 = 21,381.32/x
  3. Step 3: Cross multiply
    39,286.70x = 54,214.59 × 21,381.32
  4. Step 4: Simplify right side
    39,286.70x = 1,159,179,497.46
  5. Step 5: Solve for x
    x = 1,159,179,497.46/39,286.70
  6. Step 6: Final answer
    x = 29,505.65

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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.