Home / 20,935.05-28,890.04-11,503.41

Finding the Fourth Proportional to 20,935.05, 28,890.04 and 11,503.41

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Solution

The fourth proportional to 20,935.05, 28,890.04 and 11,503.41 is: 15,874.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,935.05 : 28,890.04 = 11,503.41 : x
  2. Step 2: Convert to fraction form
    20,935.05/28,890.04 = 11,503.41/x
  3. Step 3: Cross multiply
    20,935.05x = 28,890.04 × 11,503.41
  4. Step 4: Simplify right side
    20,935.05x = 332,333,989.42
  5. Step 5: Solve for x
    x = 332,333,989.42/20,935.05
  6. Step 6: Final answer
    x = 15,874.53

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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.