Home / 52,515.40-78,777.99-20,917.84

Finding the Fourth Proportional to 52,515.40, 78,777.99 and 20,917.84

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Solution

The fourth proportional to 52,515.40, 78,777.99 and 20,917.84 is: 31,378.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,515.40 : 78,777.99 = 20,917.84 : x
  2. Step 2: Convert to fraction form
    52,515.40/78,777.99 = 20,917.84/x
  3. Step 3: Cross multiply
    52,515.40x = 78,777.99 × 20,917.84
  4. Step 4: Simplify right side
    52,515.40x = 1,647,865,390.34
  5. Step 5: Solve for x
    x = 1,647,865,390.34/52,515.40
  6. Step 6: Final answer
    x = 31,378.71

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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.