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Finding the Fourth Proportional to 38,405.80, 57,554.70 and 30,521.80

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Solution

The fourth proportional to 38,405.80, 57,554.70 and 30,521.80 is: 45,739.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,405.80 : 57,554.70 = 30,521.80 : x
  2. Step 2: Convert to fraction form
    38,405.80/57,554.70 = 30,521.80/x
  3. Step 3: Cross multiply
    38,405.80x = 57,554.70 × 30,521.80
  4. Step 4: Simplify right side
    38,405.80x = 1,756,673,042.46
  5. Step 5: Solve for x
    x = 1,756,673,042.46/38,405.80
  6. Step 6: Final answer
    x = 45,739.79

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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.