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Finding the Fourth Proportional to 20,345.25, 30,656.50 and 16,728.50

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Solution

The fourth proportional to 20,345.25, 30,656.50 and 16,728.50 is: 25,206.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,345.25 : 30,656.50 = 16,728.50 : x
  2. Step 2: Convert to fraction form
    20,345.25/30,656.50 = 16,728.50/x
  3. Step 3: Cross multiply
    20,345.25x = 30,656.50 × 16,728.50
  4. Step 4: Simplify right side
    20,345.25x = 512,837,255.90
  5. Step 5: Solve for x
    x = 512,837,255.90/20,345.25
  6. Step 6: Final answer
    x = 25,206.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.