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Finding the Fourth Proportional to 55,266.55, 82,905.90 and 20,213.80

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Solution

The fourth proportional to 55,266.55, 82,905.90 and 20,213.80 is: 30,322.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,266.55 : 82,905.90 = 20,213.80 : x
  2. Step 2: Convert to fraction form
    55,266.55/82,905.90 = 20,213.80/x
  3. Step 3: Cross multiply
    55,266.55x = 82,905.90 × 20,213.80
  4. Step 4: Simplify right side
    55,266.55x = 1,675,843,281.42
  5. Step 5: Solve for x
    x = 1,675,843,281.42/55,266.55
  6. Step 6: Final answer
    x = 30,322.92

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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.