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Finding the Fourth Proportional to 20,050.40, 30,140.40 and 14,247.20

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Solution

The fourth proportional to 20,050.40, 30,140.40 and 14,247.20 is: 21,416.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,050.40 : 30,140.40 = 14,247.20 : x
  2. Step 2: Convert to fraction form
    20,050.40/30,140.40 = 14,247.20/x
  3. Step 3: Cross multiply
    20,050.40x = 30,140.40 × 14,247.20
  4. Step 4: Simplify right side
    20,050.40x = 429,416,306.88
  5. Step 5: Solve for x
    x = 429,416,306.88/20,050.40
  6. Step 6: Final answer
    x = 21,416.84

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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.