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Finding the Fourth Proportional to 8,612.04, 12,927.78 and 3,421.56

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Solution

The fourth proportional to 8,612.04, 12,927.78 and 3,421.56 is: 5,136.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,612.04 : 12,927.78 = 3,421.56 : x
  2. Step 2: Convert to fraction form
    8,612.04/12,927.78 = 3,421.56/x
  3. Step 3: Cross multiply
    8,612.04x = 12,927.78 × 3,421.56
  4. Step 4: Simplify right side
    8,612.04x = 44,233,174.94
  5. Step 5: Solve for x
    x = 44,233,174.94/8,612.04
  6. Step 6: Final answer
    x = 5,136.20

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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.