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Finding the Fourth Proportional to 21,697.63, 29,946.42 and 12,628.27

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Solution

The fourth proportional to 21,697.63, 29,946.42 and 12,628.27 is: 17,429.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,697.63 : 29,946.42 = 12,628.27 : x
  2. Step 2: Convert to fraction form
    21,697.63/29,946.42 = 12,628.27/x
  3. Step 3: Cross multiply
    21,697.63x = 29,946.42 × 12,628.27
  4. Step 4: Simplify right side
    21,697.63x = 378,171,477.29
  5. Step 5: Solve for x
    x = 378,171,477.29/21,697.63
  6. Step 6: Final answer
    x = 17,429.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.