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Finding the Fourth Proportional to 30,391.57, 41,922.84 and 18,283.65

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Solution

The fourth proportional to 30,391.57, 41,922.84 and 18,283.65 is: 25,220.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,391.57 : 41,922.84 = 18,283.65 : x
  2. Step 2: Convert to fraction form
    30,391.57/41,922.84 = 18,283.65/x
  3. Step 3: Cross multiply
    30,391.57x = 41,922.84 × 18,283.65
  4. Step 4: Simplify right side
    30,391.57x = 766,502,533.57
  5. Step 5: Solve for x
    x = 766,502,533.57/30,391.57
  6. Step 6: Final answer
    x = 25,220.89

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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.