Home / 13,912.20-20,870.10-6,895.80

Finding the Fourth Proportional to 13,912.20, 20,870.10 and 6,895.80

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Solution

The fourth proportional to 13,912.20, 20,870.10 and 6,895.80 is: 10,344.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,912.20 : 20,870.10 = 6,895.80 : x
  2. Step 2: Convert to fraction form
    13,912.20/20,870.10 = 6,895.80/x
  3. Step 3: Cross multiply
    13,912.20x = 20,870.10 × 6,895.80
  4. Step 4: Simplify right side
    13,912.20x = 143,916,035.58
  5. Step 5: Solve for x
    x = 143,916,035.58/13,912.20
  6. Step 6: Final answer
    x = 10,344.59

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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.