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Finding the Fourth Proportional to 51,230.87, 70,698.92 and 28,571.30

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Solution

The fourth proportional to 51,230.87, 70,698.92 and 28,571.30 is: 39,428.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,230.87 : 70,698.92 = 28,571.30 : x
  2. Step 2: Convert to fraction form
    51,230.87/70,698.92 = 28,571.30/x
  3. Step 3: Cross multiply
    51,230.87x = 70,698.92 × 28,571.30
  4. Step 4: Simplify right side
    51,230.87x = 2,019,959,556.64
  5. Step 5: Solve for x
    x = 2,019,959,556.64/51,230.87
  6. Step 6: Final answer
    x = 39,428.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.