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Finding the Fourth Proportional to 21,057.92, 31,604.16 and 10,672.64

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Solution

The fourth proportional to 21,057.92, 31,604.16 and 10,672.64 is: 16,017.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,057.92 : 31,604.16 = 10,672.64 : x
  2. Step 2: Convert to fraction form
    21,057.92/31,604.16 = 10,672.64/x
  3. Step 3: Cross multiply
    21,057.92x = 31,604.16 × 10,672.64
  4. Step 4: Simplify right side
    21,057.92x = 337,299,822.18
  5. Step 5: Solve for x
    x = 337,299,822.18/21,057.92
  6. Step 6: Final answer
    x = 16,017.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.