Home / 20,905.89-31,342.25-7,576.80

Finding the Fourth Proportional to 20,905.89, 31,342.25 and 7,576.80

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Solution

The fourth proportional to 20,905.89, 31,342.25 and 7,576.80 is: 11,359.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,905.89 : 31,342.25 = 7,576.80 : x
  2. Step 2: Convert to fraction form
    20,905.89/31,342.25 = 7,576.80/x
  3. Step 3: Cross multiply
    20,905.89x = 31,342.25 × 7,576.80
  4. Step 4: Simplify right side
    20,905.89x = 237,473,959.80
  5. Step 5: Solve for x
    x = 237,473,959.80/20,905.89
  6. Step 6: Final answer
    x = 11,359.19

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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.