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Finding the Fourth Proportional to 20,235.52, 30,345.98 and 8,549.65

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Solution

The fourth proportional to 20,235.52, 30,345.98 and 8,549.65 is: 12,821.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,235.52 : 30,345.98 = 8,549.65 : x
  2. Step 2: Convert to fraction form
    20,235.52/30,345.98 = 8,549.65/x
  3. Step 3: Cross multiply
    20,235.52x = 30,345.98 × 8,549.65
  4. Step 4: Simplify right side
    20,235.52x = 259,447,356.18
  5. Step 5: Solve for x
    x = 259,447,356.18/20,235.52
  6. Step 6: Final answer
    x = 12,821.39

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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.