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Finding the Fourth Proportional to 20,163.10, 28,257.50 and 20,163.10

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Solution

The fourth proportional to 20,163.10, 28,257.50 and 20,163.10 is: 28,257.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,163.10 : 28,257.50 = 20,163.10 : x
  2. Step 2: Convert to fraction form
    20,163.10/28,257.50 = 20,163.10/x
  3. Step 3: Cross multiply
    20,163.10x = 28,257.50 × 20,163.10
  4. Step 4: Simplify right side
    20,163.10x = 569,758,798.25
  5. Step 5: Solve for x
    x = 569,758,798.25/20,163.10
  6. Step 6: Final answer
    x = 28,257.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.