Home / 42,835.20-64,215.84-20,618.02

Finding the Fourth Proportional to 42,835.20, 64,215.84 and 20,618.02

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Solution

The fourth proportional to 42,835.20, 64,215.84 and 20,618.02 is: 30,909.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,835.20 : 64,215.84 = 20,618.02 : x
  2. Step 2: Convert to fraction form
    42,835.20/64,215.84 = 20,618.02/x
  3. Step 3: Cross multiply
    42,835.20x = 64,215.84 × 20,618.02
  4. Step 4: Simplify right side
    42,835.20x = 1,324,003,473.44
  5. Step 5: Solve for x
    x = 1,324,003,473.44/42,835.20
  6. Step 6: Final answer
    x = 30,909.24

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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.