Home / 20,850.81-28,771.38-11,897.76

Finding the Fourth Proportional to 20,850.81, 28,771.38 and 11,897.76

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Solution

The fourth proportional to 20,850.81, 28,771.38 and 11,897.76 is: 16,417.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,850.81 : 28,771.38 = 11,897.76 : x
  2. Step 2: Convert to fraction form
    20,850.81/28,771.38 = 11,897.76/x
  3. Step 3: Cross multiply
    20,850.81x = 28,771.38 × 11,897.76
  4. Step 4: Simplify right side
    20,850.81x = 342,314,974.11
  5. Step 5: Solve for x
    x = 342,314,974.11/20,850.81
  6. Step 6: Final answer
    x = 16,417.35

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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.