Home / 28,529.70-39,369.21-15,782.58

Finding the Fourth Proportional to 28,529.70, 39,369.21 and 15,782.58

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Solution

The fourth proportional to 28,529.70, 39,369.21 and 15,782.58 is: 21,778.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,529.70 : 39,369.21 = 15,782.58 : x
  2. Step 2: Convert to fraction form
    28,529.70/39,369.21 = 15,782.58/x
  3. Step 3: Cross multiply
    28,529.70x = 39,369.21 × 15,782.58
  4. Step 4: Simplify right side
    28,529.70x = 621,347,706.36
  5. Step 5: Solve for x
    x = 621,347,706.36/28,529.70
  6. Step 6: Final answer
    x = 21,778.98

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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.