Home / 20,864.45-31,309.44-8,382.15

Finding the Fourth Proportional to 20,864.45, 31,309.44 and 8,382.15

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Solution

The fourth proportional to 20,864.45, 31,309.44 and 8,382.15 is: 12,578.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,864.45 : 31,309.44 = 8,382.15 : x
  2. Step 2: Convert to fraction form
    20,864.45/31,309.44 = 8,382.15/x
  3. Step 3: Cross multiply
    20,864.45x = 31,309.44 × 8,382.15
  4. Step 4: Simplify right side
    20,864.45x = 262,440,391.06
  5. Step 5: Solve for x
    x = 262,440,391.06/20,864.45
  6. Step 6: Final answer
    x = 12,578.35

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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.