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Finding the Fourth Proportional to 20,401.64, 30,611.64 and 11,030.72

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Solution

The fourth proportional to 20,401.64, 30,611.64 and 11,030.72 is: 16,551.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,401.64 : 30,611.64 = 11,030.72 : x
  2. Step 2: Convert to fraction form
    20,401.64/30,611.64 = 11,030.72/x
  3. Step 3: Cross multiply
    20,401.64x = 30,611.64 × 11,030.72
  4. Step 4: Simplify right side
    20,401.64x = 337,668,429.58
  5. Step 5: Solve for x
    x = 337,668,429.58/20,401.64
  6. Step 6: Final answer
    x = 16,551.04

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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.