Home / 31,043.84-42,829.39-20,837.37

Finding the Fourth Proportional to 31,043.84, 42,829.39 and 20,837.37

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Solution

The fourth proportional to 31,043.84, 42,829.39 and 20,837.37 is: 28,748.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,043.84 : 42,829.39 = 20,837.37 : x
  2. Step 2: Convert to fraction form
    31,043.84/42,829.39 = 20,837.37/x
  3. Step 3: Cross multiply
    31,043.84x = 42,829.39 × 20,837.37
  4. Step 4: Simplify right side
    31,043.84x = 892,451,794.21
  5. Step 5: Solve for x
    x = 892,451,794.21/31,043.84
  6. Step 6: Final answer
    x = 28,748.11

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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.