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Finding the Fourth Proportional to 20,344.40, 30,505.80 and 8,644.40

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Solution

The fourth proportional to 20,344.40, 30,505.80 and 8,644.40 is: 12,962.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,344.40 : 30,505.80 = 8,644.40 : x
  2. Step 2: Convert to fraction form
    20,344.40/30,505.80 = 8,644.40/x
  3. Step 3: Cross multiply
    20,344.40x = 30,505.80 × 8,644.40
  4. Step 4: Simplify right side
    20,344.40x = 263,704,337.52
  5. Step 5: Solve for x
    x = 263,704,337.52/20,344.40
  6. Step 6: Final answer
    x = 12,962.01

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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.