Home / 20,800.50-28,704.69-11,369.10

Finding the Fourth Proportional to 20,800.50, 28,704.69 and 11,369.10

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Solution

The fourth proportional to 20,800.50, 28,704.69 and 11,369.10 is: 15,689.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,800.50 : 28,704.69 = 11,369.10 : x
  2. Step 2: Convert to fraction form
    20,800.50/28,704.69 = 11,369.10/x
  3. Step 3: Cross multiply
    20,800.50x = 28,704.69 × 11,369.10
  4. Step 4: Simplify right side
    20,800.50x = 326,346,491.08
  5. Step 5: Solve for x
    x = 326,346,491.08/20,800.50
  6. Step 6: Final answer
    x = 15,689.36

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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.