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Finding the Fourth Proportional to 12,917.16, 17,709.21 and 12,683.88

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Solution

The fourth proportional to 12,917.16, 17,709.21 and 12,683.88 is: 17,389.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,917.16 : 17,709.21 = 12,683.88 : x
  2. Step 2: Convert to fraction form
    12,917.16/17,709.21 = 12,683.88/x
  3. Step 3: Cross multiply
    12,917.16x = 17,709.21 × 12,683.88
  4. Step 4: Simplify right side
    12,917.16x = 224,621,494.53
  5. Step 5: Solve for x
    x = 224,621,494.53/12,917.16
  6. Step 6: Final answer
    x = 17,389.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.