Home / 20,996.89-28,974.61-13,038.94

Finding the Fourth Proportional to 20,996.89, 28,974.61 and 13,038.94

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Solution

The fourth proportional to 20,996.89, 28,974.61 and 13,038.94 is: 17,993.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,996.89 : 28,974.61 = 13,038.94 : x
  2. Step 2: Convert to fraction form
    20,996.89/28,974.61 = 13,038.94/x
  3. Step 3: Cross multiply
    20,996.89x = 28,974.61 × 13,038.94
  4. Step 4: Simplify right side
    20,996.89x = 377,798,253.83
  5. Step 5: Solve for x
    x = 377,798,253.83/20,996.89
  6. Step 6: Final answer
    x = 17,993.06

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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.