Home / 42,655.21-64,021.39-21,609.79

Finding the Fourth Proportional to 42,655.21, 64,021.39 and 21,609.79

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Solution

The fourth proportional to 42,655.21, 64,021.39 and 21,609.79 is: 32,434.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,655.21 : 64,021.39 = 21,609.79 : x
  2. Step 2: Convert to fraction form
    42,655.21/64,021.39 = 21,609.79/x
  3. Step 3: Cross multiply
    42,655.21x = 64,021.39 × 21,609.79
  4. Step 4: Simplify right side
    42,655.21x = 1,383,488,579.33
  5. Step 5: Solve for x
    x = 1,383,488,579.33/42,655.21
  6. Step 6: Final answer
    x = 32,434.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.