Home / 20,950.06-31,411.21-8,291.43

Finding the Fourth Proportional to 20,950.06, 31,411.21 and 8,291.43

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Solution

The fourth proportional to 20,950.06, 31,411.21 and 8,291.43 is: 12,431.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,950.06 : 31,411.21 = 8,291.43 : x
  2. Step 2: Convert to fraction form
    20,950.06/31,411.21 = 8,291.43/x
  3. Step 3: Cross multiply
    20,950.06x = 31,411.21 × 8,291.43
  4. Step 4: Simplify right side
    20,950.06x = 260,443,728.72
  5. Step 5: Solve for x
    x = 260,443,728.72/20,950.06
  6. Step 6: Final answer
    x = 12,431.65

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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.