Home / 20,880.37-31,312.77-8,396.19

Finding the Fourth Proportional to 20,880.37, 31,312.77 and 8,396.19

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Solution

The fourth proportional to 20,880.37, 31,312.77 and 8,396.19 is: 12,591.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,880.37 : 31,312.77 = 8,396.19 : x
  2. Step 2: Convert to fraction form
    20,880.37/31,312.77 = 8,396.19/x
  3. Step 3: Cross multiply
    20,880.37x = 31,312.77 × 8,396.19
  4. Step 4: Simplify right side
    20,880.37x = 262,907,934.86
  5. Step 5: Solve for x
    x = 262,907,934.86/20,880.37
  6. Step 6: Final answer
    x = 12,591.15

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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.