Home / 31,753.94-43,806.30-20,421.34

Finding the Fourth Proportional to 31,753.94, 43,806.30 and 20,421.34

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Solution

The fourth proportional to 31,753.94, 43,806.30 and 20,421.34 is: 28,172.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,753.94 : 43,806.30 = 20,421.34 : x
  2. Step 2: Convert to fraction form
    31,753.94/43,806.30 = 20,421.34/x
  3. Step 3: Cross multiply
    31,753.94x = 43,806.30 × 20,421.34
  4. Step 4: Simplify right side
    31,753.94x = 894,583,346.44
  5. Step 5: Solve for x
    x = 894,583,346.44/31,753.94
  6. Step 6: Final answer
    x = 28,172.36

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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.