Home / 39,620.56-54,676.79-21,715.16

Finding the Fourth Proportional to 39,620.56, 54,676.79 and 21,715.16

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Solution

The fourth proportional to 39,620.56, 54,676.79 and 21,715.16 is: 29,967.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,620.56 : 54,676.79 = 21,715.16 : x
  2. Step 2: Convert to fraction form
    39,620.56/54,676.79 = 21,715.16/x
  3. Step 3: Cross multiply
    39,620.56x = 54,676.79 × 21,715.16
  4. Step 4: Simplify right side
    39,620.56x = 1,187,315,243.14
  5. Step 5: Solve for x
    x = 1,187,315,243.14/39,620.56
  6. Step 6: Final answer
    x = 29,967.15

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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.