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Finding the Fourth Proportional to 21,697.92, 29,935.08 and 12,259.44

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Solution

The fourth proportional to 21,697.92, 29,935.08 and 12,259.44 is: 16,913.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,697.92 : 29,935.08 = 12,259.44 : x
  2. Step 2: Convert to fraction form
    21,697.92/29,935.08 = 12,259.44/x
  3. Step 3: Cross multiply
    21,697.92x = 29,935.08 × 12,259.44
  4. Step 4: Simplify right side
    21,697.92x = 366,987,317.16
  5. Step 5: Solve for x
    x = 366,987,317.16/21,697.92
  6. Step 6: Final answer
    x = 16,913.48

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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.