Home / 20,736.40-31,101.30-6,885.40

Finding the Fourth Proportional to 20,736.40, 31,101.30 and 6,885.40

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Solution

The fourth proportional to 20,736.40, 31,101.30 and 6,885.40 is: 10,327.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,736.40 : 31,101.30 = 6,885.40 : x
  2. Step 2: Convert to fraction form
    20,736.40/31,101.30 = 6,885.40/x
  3. Step 3: Cross multiply
    20,736.40x = 31,101.30 × 6,885.40
  4. Step 4: Simplify right side
    20,736.40x = 214,144,891.02
  5. Step 5: Solve for x
    x = 214,144,891.02/20,736.40
  6. Step 6: Final answer
    x = 10,327.00

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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.