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Finding the Fourth Proportional to 21,895.92, 30,216.24 and 12,464.28

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Solution

The fourth proportional to 21,895.92, 30,216.24 and 12,464.28 is: 17,200.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,895.92 : 30,216.24 = 12,464.28 : x
  2. Step 2: Convert to fraction form
    21,895.92/30,216.24 = 12,464.28/x
  3. Step 3: Cross multiply
    21,895.92x = 30,216.24 × 12,464.28
  4. Step 4: Simplify right side
    21,895.92x = 376,623,675.91
  5. Step 5: Solve for x
    x = 376,623,675.91/21,895.92
  6. Step 6: Final answer
    x = 17,200.63

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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.