Home / 42,821.75-64,238.76-13,241.90

Finding the Fourth Proportional to 42,821.75, 64,238.76 and 13,241.90

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Solution

The fourth proportional to 42,821.75, 64,238.76 and 13,241.90 is: 19,864.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,821.75 : 64,238.76 = 13,241.90 : x
  2. Step 2: Convert to fraction form
    42,821.75/64,238.76 = 13,241.90/x
  3. Step 3: Cross multiply
    42,821.75x = 64,238.76 × 13,241.90
  4. Step 4: Simplify right side
    42,821.75x = 850,642,914.85
  5. Step 5: Solve for x
    x = 850,642,914.85/42,821.75
  6. Step 6: Final answer
    x = 19,864.74

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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.