Home / 20,108.86-30,143.85-7,620.28

Finding the Fourth Proportional to 20,108.86, 30,143.85 and 7,620.28

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Solution

The fourth proportional to 20,108.86, 30,143.85 and 7,620.28 is: 11,423.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,108.86 : 30,143.85 = 7,620.28 : x
  2. Step 2: Convert to fraction form
    20,108.86/30,143.85 = 7,620.28/x
  3. Step 3: Cross multiply
    20,108.86x = 30,143.85 × 7,620.28
  4. Step 4: Simplify right side
    20,108.86x = 229,704,577.28
  5. Step 5: Solve for x
    x = 229,704,577.28/20,108.86
  6. Step 6: Final answer
    x = 11,423.05

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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.