Home / 28,728.78-39,648.09-15,984.36

Finding the Fourth Proportional to 28,728.78, 39,648.09 and 15,984.36

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Solution

The fourth proportional to 28,728.78, 39,648.09 and 15,984.36 is: 22,059.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,728.78 : 39,648.09 = 15,984.36 : x
  2. Step 2: Convert to fraction form
    28,728.78/39,648.09 = 15,984.36/x
  3. Step 3: Cross multiply
    28,728.78x = 39,648.09 × 15,984.36
  4. Step 4: Simplify right side
    28,728.78x = 633,749,343.87
  5. Step 5: Solve for x
    x = 633,749,343.87/28,728.78
  6. Step 6: Final answer
    x = 22,059.74

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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.