Home / 39,146.58-54,020.79-21,240.99

Finding the Fourth Proportional to 39,146.58, 54,020.79 and 21,240.99

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Solution

The fourth proportional to 39,146.58, 54,020.79 and 21,240.99 is: 29,311.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,146.58 : 54,020.79 = 21,240.99 : x
  2. Step 2: Convert to fraction form
    39,146.58/54,020.79 = 21,240.99/x
  3. Step 3: Cross multiply
    39,146.58x = 54,020.79 × 21,240.99
  4. Step 4: Simplify right side
    39,146.58x = 1,147,455,060.18
  5. Step 5: Solve for x
    x = 1,147,455,060.18/39,146.58
  6. Step 6: Final answer
    x = 29,311.76

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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.