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Finding the Fourth Proportional to 28,361.61, 42,539.16 and 7,586.73

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Solution

The fourth proportional to 28,361.61, 42,539.16 and 7,586.73 is: 11,379.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,361.61 : 42,539.16 = 7,586.73 : x
  2. Step 2: Convert to fraction form
    28,361.61/42,539.16 = 7,586.73/x
  3. Step 3: Cross multiply
    28,361.61x = 42,539.16 × 7,586.73
  4. Step 4: Simplify right side
    28,361.61x = 322,733,121.35
  5. Step 5: Solve for x
    x = 322,733,121.35/28,361.61
  6. Step 6: Final answer
    x = 11,379.22

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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.