Home / 20,938.05-28,890.39-12,442.77

Finding the Fourth Proportional to 20,938.05, 28,890.39 and 12,442.77

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Solution

The fourth proportional to 20,938.05, 28,890.39 and 12,442.77 is: 17,168.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,938.05 : 28,890.39 = 12,442.77 : x
  2. Step 2: Convert to fraction form
    20,938.05/28,890.39 = 12,442.77/x
  3. Step 3: Cross multiply
    20,938.05x = 28,890.39 × 12,442.77
  4. Step 4: Simplify right side
    20,938.05x = 359,476,477.98
  5. Step 5: Solve for x
    x = 359,476,477.98/20,938.05
  6. Step 6: Final answer
    x = 17,168.57

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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.