Home / 39,780.10-54,896.53-21,876.26

Finding the Fourth Proportional to 39,780.10, 54,896.53 and 21,876.26

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Solution

The fourth proportional to 39,780.10, 54,896.53 and 21,876.26 is: 30,189.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,780.10 : 54,896.53 = 21,876.26 : x
  2. Step 2: Convert to fraction form
    39,780.10/54,896.53 = 21,876.26/x
  3. Step 3: Cross multiply
    39,780.10x = 54,896.53 × 21,876.26
  4. Step 4: Simplify right side
    39,780.10x = 1,200,930,845.93
  5. Step 5: Solve for x
    x = 1,200,930,845.93/39,780.10
  6. Step 6: Final answer
    x = 30,189.24

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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.