Home / 20,072.88-30,113.10-8,387.28

Finding the Fourth Proportional to 20,072.88, 30,113.10 and 8,387.28

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Solution

The fourth proportional to 20,072.88, 30,113.10 and 8,387.28 is: 12,582.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,072.88 : 30,113.10 = 8,387.28 : x
  2. Step 2: Convert to fraction form
    20,072.88/30,113.10 = 8,387.28/x
  3. Step 3: Cross multiply
    20,072.88x = 30,113.10 × 8,387.28
  4. Step 4: Simplify right side
    20,072.88x = 252,567,001.37
  5. Step 5: Solve for x
    x = 252,567,001.37/20,072.88
  6. Step 6: Final answer
    x = 12,582.50

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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.