Home / 51,438.45-70,991.60-28,778.70

Finding the Fourth Proportional to 51,438.45, 70,991.60 and 28,778.70

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Solution

The fourth proportional to 51,438.45, 70,991.60 and 28,778.70 is: 39,718.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,438.45 : 70,991.60 = 28,778.70 : x
  2. Step 2: Convert to fraction form
    51,438.45/70,991.60 = 28,778.70/x
  3. Step 3: Cross multiply
    51,438.45x = 70,991.60 × 28,778.70
  4. Step 4: Simplify right side
    51,438.45x = 2,043,045,958.92
  5. Step 5: Solve for x
    x = 2,043,045,958.92/51,438.45
  6. Step 6: Final answer
    x = 39,718.26

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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.