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Finding the Fourth Proportional to 20,900.59, 31,350.77 and 7,401.77

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Solution

The fourth proportional to 20,900.59, 31,350.77 and 7,401.77 is: 11,102.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,900.59 : 31,350.77 = 7,401.77 : x
  2. Step 2: Convert to fraction form
    20,900.59/31,350.77 = 7,401.77/x
  3. Step 3: Cross multiply
    20,900.59x = 31,350.77 × 7,401.77
  4. Step 4: Simplify right side
    20,900.59x = 232,051,188.86
  5. Step 5: Solve for x
    x = 232,051,188.86/20,900.59
  6. Step 6: Final answer
    x = 11,102.61

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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.