Home / 20,812.11-31,187.24-12,482.37

Finding the Fourth Proportional to 20,812.11, 31,187.24 and 12,482.37

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Solution

The fourth proportional to 20,812.11, 31,187.24 and 12,482.37 is: 18,705.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,812.11 : 31,187.24 = 12,482.37 : x
  2. Step 2: Convert to fraction form
    20,812.11/31,187.24 = 12,482.37/x
  3. Step 3: Cross multiply
    20,812.11x = 31,187.24 × 12,482.37
  4. Step 4: Simplify right side
    20,812.11x = 389,290,606.55
  5. Step 5: Solve for x
    x = 389,290,606.55/20,812.11
  6. Step 6: Final answer
    x = 18,705.00

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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.