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Finding the Fourth Proportional to 28,586.32, 42,879.09 and 8,864.89

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Solution

The fourth proportional to 28,586.32, 42,879.09 and 8,864.89 is: 13,297.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,586.32 : 42,879.09 = 8,864.89 : x
  2. Step 2: Convert to fraction form
    28,586.32/42,879.09 = 8,864.89/x
  3. Step 3: Cross multiply
    28,586.32x = 42,879.09 × 8,864.89
  4. Step 4: Simplify right side
    28,586.32x = 380,118,416.15
  5. Step 5: Solve for x
    x = 380,118,416.15/28,586.32
  6. Step 6: Final answer
    x = 13,297.21

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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.