Home / 20,803.57-28,707.92-11,851.45

Finding the Fourth Proportional to 20,803.57, 28,707.92 and 11,851.45

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Solution

The fourth proportional to 20,803.57, 28,707.92 and 11,851.45 is: 16,354.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,803.57 : 28,707.92 = 11,851.45 : x
  2. Step 2: Convert to fraction form
    20,803.57/28,707.92 = 11,851.45/x
  3. Step 3: Cross multiply
    20,803.57x = 28,707.92 × 11,851.45
  4. Step 4: Simplify right side
    20,803.57x = 340,230,391.90
  5. Step 5: Solve for x
    x = 340,230,391.90/20,803.57
  6. Step 6: Final answer
    x = 16,354.43

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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.