Home / 20,953.14-31,427.82-12,576.90

Finding the Fourth Proportional to 20,953.14, 31,427.82 and 12,576.90

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Solution

The fourth proportional to 20,953.14, 31,427.82 and 12,576.90 is: 18,864.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,953.14 : 31,427.82 = 12,576.90 : x
  2. Step 2: Convert to fraction form
    20,953.14/31,427.82 = 12,576.90/x
  3. Step 3: Cross multiply
    20,953.14x = 31,427.82 × 12,576.90
  4. Step 4: Simplify right side
    20,953.14x = 395,264,549.36
  5. Step 5: Solve for x
    x = 395,264,549.36/20,953.14
  6. Step 6: Final answer
    x = 18,864.22

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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.