Home / 20,800.47-28,704.60-11,369.10

Finding the Fourth Proportional to 20,800.47, 28,704.60 and 11,369.10

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Solution

The fourth proportional to 20,800.47, 28,704.60 and 11,369.10 is: 15,689.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,800.47 : 28,704.60 = 11,369.10 : x
  2. Step 2: Convert to fraction form
    20,800.47/28,704.60 = 11,369.10/x
  3. Step 3: Cross multiply
    20,800.47x = 28,704.60 × 11,369.10
  4. Step 4: Simplify right side
    20,800.47x = 326,345,467.86
  5. Step 5: Solve for x
    x = 326,345,467.86/20,800.47
  6. Step 6: Final answer
    x = 15,689.33

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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.