Home / 28,556.35-42,772.15-11,865.79

Finding the Fourth Proportional to 28,556.35, 42,772.15 and 11,865.79

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Solution

The fourth proportional to 28,556.35, 42,772.15 and 11,865.79 is: 17,772.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,556.35 : 42,772.15 = 11,865.79 : x
  2. Step 2: Convert to fraction form
    28,556.35/42,772.15 = 11,865.79/x
  3. Step 3: Cross multiply
    28,556.35x = 42,772.15 × 11,865.79
  4. Step 4: Simplify right side
    28,556.35x = 507,525,418.05
  5. Step 5: Solve for x
    x = 507,525,418.05/28,556.35
  6. Step 6: Final answer
    x = 17,772.77

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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.