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Finding the Fourth Proportional to 28,234.81, 42,356.12 and 9,520.20

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Solution

The fourth proportional to 28,234.81, 42,356.12 and 9,520.20 is: 14,281.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,234.81 : 42,356.12 = 9,520.20 : x
  2. Step 2: Convert to fraction form
    28,234.81/42,356.12 = 9,520.20/x
  3. Step 3: Cross multiply
    28,234.81x = 42,356.12 × 9,520.20
  4. Step 4: Simplify right side
    28,234.81x = 403,238,474.24
  5. Step 5: Solve for x
    x = 403,238,474.24/28,234.81
  6. Step 6: Final answer
    x = 14,281.61

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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.