Home / 42,885.82-64,350.66-20,421.88

Finding the Fourth Proportional to 42,885.82, 64,350.66 and 20,421.88

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Solution

The fourth proportional to 42,885.82, 64,350.66 and 20,421.88 is: 30,643.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,885.82 : 64,350.66 = 20,421.88 : x
  2. Step 2: Convert to fraction form
    42,885.82/64,350.66 = 20,421.88/x
  3. Step 3: Cross multiply
    42,885.82x = 64,350.66 × 20,421.88
  4. Step 4: Simplify right side
    42,885.82x = 1,314,161,456.44
  5. Step 5: Solve for x
    x = 1,314,161,456.44/42,885.82
  6. Step 6: Final answer
    x = 30,643.26

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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.