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Finding the Fourth Proportional to 8,617.64, 12,929.54 and 4,238.17

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Solution

The fourth proportional to 8,617.64, 12,929.54 and 4,238.17 is: 6,358.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,617.64 : 12,929.54 = 4,238.17 : x
  2. Step 2: Convert to fraction form
    8,617.64/12,929.54 = 4,238.17/x
  3. Step 3: Cross multiply
    8,617.64x = 12,929.54 × 4,238.17
  4. Step 4: Simplify right side
    8,617.64x = 54,797,631.60
  5. Step 5: Solve for x
    x = 54,797,631.60/8,617.64
  6. Step 6: Final answer
    x = 6,358.77

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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.