Home / 20,892.05-31,347.26-8,436.36

Finding the Fourth Proportional to 20,892.05, 31,347.26 and 8,436.36

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Solution

The fourth proportional to 20,892.05, 31,347.26 and 8,436.36 is: 12,658.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,892.05 : 31,347.26 = 8,436.36 : x
  2. Step 2: Convert to fraction form
    20,892.05/31,347.26 = 8,436.36/x
  3. Step 3: Cross multiply
    20,892.05x = 31,347.26 × 8,436.36
  4. Step 4: Simplify right side
    20,892.05x = 264,456,770.37
  5. Step 5: Solve for x
    x = 264,456,770.37/20,892.05
  6. Step 6: Final answer
    x = 12,658.25

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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.