Home / 20,890.41-28,829.22-11,458.97

Finding the Fourth Proportional to 20,890.41, 28,829.22 and 11,458.97

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Solution

The fourth proportional to 20,890.41, 28,829.22 and 11,458.97 is: 15,813.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,890.41 : 28,829.22 = 11,458.97 : x
  2. Step 2: Convert to fraction form
    20,890.41/28,829.22 = 11,458.97/x
  3. Step 3: Cross multiply
    20,890.41x = 28,829.22 × 11,458.97
  4. Step 4: Simplify right side
    20,890.41x = 330,353,088.10
  5. Step 5: Solve for x
    x = 330,353,088.10/20,890.41
  6. Step 6: Final answer
    x = 15,813.63

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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.