Home / 28,529.55-39,367.32-15,781.87

Finding the Fourth Proportional to 28,529.55, 39,367.32 and 15,781.87

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Solution

The fourth proportional to 28,529.55, 39,367.32 and 15,781.87 is: 21,777.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,529.55 : 39,367.32 = 15,781.87 : x
  2. Step 2: Convert to fraction form
    28,529.55/39,367.32 = 15,781.87/x
  3. Step 3: Cross multiply
    28,529.55x = 39,367.32 × 15,781.87
  4. Step 4: Simplify right side
    28,529.55x = 621,289,916.52
  5. Step 5: Solve for x
    x = 621,289,916.52/28,529.55
  6. Step 6: Final answer
    x = 21,777.07

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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.