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Finding the Fourth Proportional to 8,612.68, 12,921 and 2,456.68

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Solution

The fourth proportional to 8,612.68, 12,921 and 2,456.68 is: 3,685.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,612.68 : 12,921 = 2,456.68 : x
  2. Step 2: Convert to fraction form
    8,612.68/12,921 = 2,456.68/x
  3. Step 3: Cross multiply
    8,612.68x = 12,921 × 2,456.68
  4. Step 4: Simplify right side
    8,612.68x = 31,742,762.28
  5. Step 5: Solve for x
    x = 31,742,762.28/8,612.68
  6. Step 6: Final answer
    x = 3,685.58

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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.