Home / 20,754.95-31,109.30-8,271.73

Finding the Fourth Proportional to 20,754.95, 31,109.30 and 8,271.73

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Solution

The fourth proportional to 20,754.95, 31,109.30 and 8,271.73 is: 12,398.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,754.95 : 31,109.30 = 8,271.73 : x
  2. Step 2: Convert to fraction form
    20,754.95/31,109.30 = 8,271.73/x
  3. Step 3: Cross multiply
    20,754.95x = 31,109.30 × 8,271.73
  4. Step 4: Simplify right side
    20,754.95x = 257,327,730.09
  5. Step 5: Solve for x
    x = 257,327,730.09/20,754.95
  6. Step 6: Final answer
    x = 12,398.38

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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.