Home / 20,744.52-31,129.80-10,890.84

Finding the Fourth Proportional to 20,744.52, 31,129.80 and 10,890.84

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Solution

The fourth proportional to 20,744.52, 31,129.80 and 10,890.84 is: 16,343.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,744.52 : 31,129.80 = 10,890.84 : x
  2. Step 2: Convert to fraction form
    20,744.52/31,129.80 = 10,890.84/x
  3. Step 3: Cross multiply
    20,744.52x = 31,129.80 × 10,890.84
  4. Step 4: Simplify right side
    20,744.52x = 339,029,671.03
  5. Step 5: Solve for x
    x = 339,029,671.03/20,744.52
  6. Step 6: Final answer
    x = 16,343.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.