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Finding the Fourth Proportional to 21,610.80, 29,822.04 and 12,181.32

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Solution

The fourth proportional to 21,610.80, 29,822.04 and 12,181.32 is: 16,809.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,610.80 : 29,822.04 = 12,181.32 : x
  2. Step 2: Convert to fraction form
    21,610.80/29,822.04 = 12,181.32/x
  3. Step 3: Cross multiply
    21,610.80x = 29,822.04 × 12,181.32
  4. Step 4: Simplify right side
    21,610.80x = 363,271,812.29
  5. Step 5: Solve for x
    x = 363,271,812.29/21,610.80
  6. Step 6: Final answer
    x = 16,809.73

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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.