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Finding the Fourth Proportional to 8,612.62, 12,921.12 and 2,456.62

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Solution

The fourth proportional to 8,612.62, 12,921.12 and 2,456.62 is: 3,685.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,612.62 : 12,921.12 = 2,456.62 : x
  2. Step 2: Convert to fraction form
    8,612.62/12,921.12 = 2,456.62/x
  3. Step 3: Cross multiply
    8,612.62x = 12,921.12 × 2,456.62
  4. Step 4: Simplify right side
    8,612.62x = 31,742,281.81
  5. Step 5: Solve for x
    x = 31,742,281.81/8,612.62
  6. Step 6: Final answer
    x = 3,685.55

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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.