Home / 20,885.36-28,821.66-11,325.29

Finding the Fourth Proportional to 20,885.36, 28,821.66 and 11,325.29

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Solution

The fourth proportional to 20,885.36, 28,821.66 and 11,325.29 is: 15,628.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,885.36 : 28,821.66 = 11,325.29 : x
  2. Step 2: Convert to fraction form
    20,885.36/28,821.66 = 11,325.29/x
  3. Step 3: Cross multiply
    20,885.36x = 28,821.66 × 11,325.29
  4. Step 4: Simplify right side
    20,885.36x = 326,413,657.78
  5. Step 5: Solve for x
    x = 326,413,657.78/20,885.36
  6. Step 6: Final answer
    x = 15,628.83

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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.