Home / 42,910.21-64,281.52-20,388.84

Finding the Fourth Proportional to 42,910.21, 64,281.52 and 20,388.84

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Solution

The fourth proportional to 42,910.21, 64,281.52 and 20,388.84 is: 30,543.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,910.21 : 64,281.52 = 20,388.84 : x
  2. Step 2: Convert to fraction form
    42,910.21/64,281.52 = 20,388.84/x
  3. Step 3: Cross multiply
    42,910.21x = 64,281.52 × 20,388.84
  4. Step 4: Simplify right side
    42,910.21x = 1,310,625,626.24
  5. Step 5: Solve for x
    x = 1,310,625,626.24/42,910.21
  6. Step 6: Final answer
    x = 30,543.44

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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.