Home / 20,811.84-31,140.96-12,496.92

Finding the Fourth Proportional to 20,811.84, 31,140.96 and 12,496.92

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Solution

The fourth proportional to 20,811.84, 31,140.96 and 12,496.92 is: 18,699.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,811.84 : 31,140.96 = 12,496.92 : x
  2. Step 2: Convert to fraction form
    20,811.84/31,140.96 = 12,496.92/x
  3. Step 3: Cross multiply
    20,811.84x = 31,140.96 × 12,496.92
  4. Step 4: Simplify right side
    20,811.84x = 389,166,085.84
  5. Step 5: Solve for x
    x = 389,166,085.84/20,811.84
  6. Step 6: Final answer
    x = 18,699.26

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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.