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Finding the Fourth Proportional to 20,364.12, 30,551.04 and 7,217.64

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Solution

The fourth proportional to 20,364.12, 30,551.04 and 7,217.64 is: 10,828.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,364.12 : 30,551.04 = 7,217.64 : x
  2. Step 2: Convert to fraction form
    20,364.12/30,551.04 = 7,217.64/x
  3. Step 3: Cross multiply
    20,364.12x = 30,551.04 × 7,217.64
  4. Step 4: Simplify right side
    20,364.12x = 220,506,408.35
  5. Step 5: Solve for x
    x = 220,506,408.35/20,364.12
  6. Step 6: Final answer
    x = 10,828.18

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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.