Home / 31,540.68-43,486.20-20,783.88

Finding the Fourth Proportional to 31,540.68, 43,486.20 and 20,783.88

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Solution

The fourth proportional to 31,540.68, 43,486.20 and 20,783.88 is: 28,655.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,540.68 : 43,486.20 = 20,783.88 : x
  2. Step 2: Convert to fraction form
    31,540.68/43,486.20 = 20,783.88/x
  3. Step 3: Cross multiply
    31,540.68x = 43,486.20 × 20,783.88
  4. Step 4: Simplify right side
    31,540.68x = 903,811,962.46
  5. Step 5: Solve for x
    x = 903,811,962.46/31,540.68
  6. Step 6: Final answer
    x = 28,655.44

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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.