Home / 20,954.18-31,431.20-8,474.06

Finding the Fourth Proportional to 20,954.18, 31,431.20 and 8,474.06

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Solution

The fourth proportional to 20,954.18, 31,431.20 and 8,474.06 is: 12,711.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,954.18 : 31,431.20 = 8,474.06 : x
  2. Step 2: Convert to fraction form
    20,954.18/31,431.20 = 8,474.06/x
  3. Step 3: Cross multiply
    20,954.18x = 31,431.20 × 8,474.06
  4. Step 4: Simplify right side
    20,954.18x = 266,349,675.15
  5. Step 5: Solve for x
    x = 266,349,675.15/20,954.18
  6. Step 6: Final answer
    x = 12,711.06

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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.