Home / 21,288.64-29,344.80-16,236.40

Finding the Fourth Proportional to 21,288.64, 29,344.80 and 16,236.40

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Solution

The fourth proportional to 21,288.64, 29,344.80 and 16,236.40 is: 22,380.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,288.64 : 29,344.80 = 16,236.40 : x
  2. Step 2: Convert to fraction form
    21,288.64/29,344.80 = 16,236.40/x
  3. Step 3: Cross multiply
    21,288.64x = 29,344.80 × 16,236.40
  4. Step 4: Simplify right side
    21,288.64x = 476,453,910.72
  5. Step 5: Solve for x
    x = 476,453,910.72/21,288.64
  6. Step 6: Final answer
    x = 22,380.66

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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.