Home / 39,689.22-54,771.81-21,785.88

Finding the Fourth Proportional to 39,689.22, 54,771.81 and 21,785.88

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Solution

The fourth proportional to 39,689.22, 54,771.81 and 21,785.88 is: 30,064.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,689.22 : 54,771.81 = 21,785.88 : x
  2. Step 2: Convert to fraction form
    39,689.22/54,771.81 = 21,785.88/x
  3. Step 3: Cross multiply
    39,689.22x = 54,771.81 × 21,785.88
  4. Step 4: Simplify right side
    39,689.22x = 1,193,252,080.04
  5. Step 5: Solve for x
    x = 1,193,252,080.04/39,689.22
  6. Step 6: Final answer
    x = 30,064.89

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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.