Home / 20,390.96-30,553.56-12,583.28

Finding the Fourth Proportional to 20,390.96, 30,553.56 and 12,583.28

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Solution

The fourth proportional to 20,390.96, 30,553.56 and 12,583.28 is: 18,854.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,390.96 : 30,553.56 = 12,583.28 : x
  2. Step 2: Convert to fraction form
    20,390.96/30,553.56 = 12,583.28/x
  3. Step 3: Cross multiply
    20,390.96x = 30,553.56 × 12,583.28
  4. Step 4: Simplify right side
    20,390.96x = 384,464,000.48
  5. Step 5: Solve for x
    x = 384,464,000.48/20,390.96
  6. Step 6: Final answer
    x = 18,854.63

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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.