Home / 20,736.81-31,028.67-12,422.70

Finding the Fourth Proportional to 20,736.81, 31,028.67 and 12,422.70

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Solution

The fourth proportional to 20,736.81, 31,028.67 and 12,422.70 is: 18,588.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,736.81 : 31,028.67 = 12,422.70 : x
  2. Step 2: Convert to fraction form
    20,736.81/31,028.67 = 12,422.70/x
  3. Step 3: Cross multiply
    20,736.81x = 31,028.67 × 12,422.70
  4. Step 4: Simplify right side
    20,736.81x = 385,459,858.81
  5. Step 5: Solve for x
    x = 385,459,858.81/20,736.81
  6. Step 6: Final answer
    x = 18,588.19

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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.