Home / 20,732.30-31,111.76-20,655.75

Finding the Fourth Proportional to 20,732.30, 31,111.76 and 20,655.75

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Solution

The fourth proportional to 20,732.30, 31,111.76 and 20,655.75 is: 30,996.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,732.30 : 31,111.76 = 20,655.75 : x
  2. Step 2: Convert to fraction form
    20,732.30/31,111.76 = 20,655.75/x
  3. Step 3: Cross multiply
    20,732.30x = 31,111.76 × 20,655.75
  4. Step 4: Simplify right side
    20,732.30x = 642,636,633.34
  5. Step 5: Solve for x
    x = 642,636,633.34/20,732.30
  6. Step 6: Final answer
    x = 30,996.89

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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.