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Finding the Fourth Proportional to 21,655.87, 29,883.16 and 12,094.43

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Solution

The fourth proportional to 21,655.87, 29,883.16 and 12,094.43 is: 16,689.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,655.87 : 29,883.16 = 12,094.43 : x
  2. Step 2: Convert to fraction form
    21,655.87/29,883.16 = 12,094.43/x
  3. Step 3: Cross multiply
    21,655.87x = 29,883.16 × 12,094.43
  4. Step 4: Simplify right side
    21,655.87x = 361,419,576.91
  5. Step 5: Solve for x
    x = 361,419,576.91/21,655.87
  6. Step 6: Final answer
    x = 16,689.22

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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.