Home / 20,800.35-28,704.47-11,368.91

Finding the Fourth Proportional to 20,800.35, 28,704.47 and 11,368.91

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Solution

The fourth proportional to 20,800.35, 28,704.47 and 11,368.91 is: 15,689.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,800.35 : 28,704.47 = 11,368.91 : x
  2. Step 2: Convert to fraction form
    20,800.35/28,704.47 = 11,368.91/x
  3. Step 3: Cross multiply
    20,800.35x = 28,704.47 × 11,368.91
  4. Step 4: Simplify right side
    20,800.35x = 326,338,636.21
  5. Step 5: Solve for x
    x = 326,338,636.21/20,800.35
  6. Step 6: Final answer
    x = 15,689.09

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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.