Home / 39,434.80-54,419.16-21,529.12

Finding the Fourth Proportional to 39,434.80, 54,419.16 and 21,529.12

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Solution

The fourth proportional to 39,434.80, 54,419.16 and 21,529.12 is: 29,709.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,434.80 : 54,419.16 = 21,529.12 : x
  2. Step 2: Convert to fraction form
    39,434.80/54,419.16 = 21,529.12/x
  3. Step 3: Cross multiply
    39,434.80x = 54,419.16 × 21,529.12
  4. Step 4: Simplify right side
    39,434.80x = 1,171,596,625.94
  5. Step 5: Solve for x
    x = 1,171,596,625.94/39,434.80
  6. Step 6: Final answer
    x = 29,709.71

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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.