Home / 20,916.48-28,865.04-11,485.92

Finding the Fourth Proportional to 20,916.48, 28,865.04 and 11,485.92

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Solution

The fourth proportional to 20,916.48, 28,865.04 and 11,485.92 is: 15,850.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,916.48 : 28,865.04 = 11,485.92 : x
  2. Step 2: Convert to fraction form
    20,916.48/28,865.04 = 11,485.92/x
  3. Step 3: Cross multiply
    20,916.48x = 28,865.04 × 11,485.92
  4. Step 4: Simplify right side
    20,916.48x = 331,541,540.24
  5. Step 5: Solve for x
    x = 331,541,540.24/20,916.48
  6. Step 6: Final answer
    x = 15,850.73

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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.