Home / 39,485.21-54,489.45-21,580.21

Finding the Fourth Proportional to 39,485.21, 54,489.45 and 21,580.21

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Solution

The fourth proportional to 39,485.21, 54,489.45 and 21,580.21 is: 29,780.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,485.21 : 54,489.45 = 21,580.21 : x
  2. Step 2: Convert to fraction form
    39,485.21/54,489.45 = 21,580.21/x
  3. Step 3: Cross multiply
    39,485.21x = 54,489.45 × 21,580.21
  4. Step 4: Simplify right side
    39,485.21x = 1,175,893,528.31
  5. Step 5: Solve for x
    x = 1,175,893,528.31/39,485.21
  6. Step 6: Final answer
    x = 29,780.61

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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.