Home / 39,285.89-54,213.49-21,380.52

Finding the Fourth Proportional to 39,285.89, 54,213.49 and 21,380.52

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Solution

The fourth proportional to 39,285.89, 54,213.49 and 21,380.52 is: 29,504.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,285.89 : 54,213.49 = 21,380.52 : x
  2. Step 2: Convert to fraction form
    39,285.89/54,213.49 = 21,380.52/x
  3. Step 3: Cross multiply
    39,285.89x = 54,213.49 × 21,380.52
  4. Step 4: Simplify right side
    39,285.89x = 1,159,112,336.15
  5. Step 5: Solve for x
    x = 1,159,112,336.15/39,285.89
  6. Step 6: Final answer
    x = 29,504.55

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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.