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Finding the Fourth Proportional to 21,051.92, 29,050.92 and 12,549.66

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Solution

The fourth proportional to 21,051.92, 29,050.92 and 12,549.66 is: 17,318.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,051.92 : 29,050.92 = 12,549.66 : x
  2. Step 2: Convert to fraction form
    21,051.92/29,050.92 = 12,549.66/x
  3. Step 3: Cross multiply
    21,051.92x = 29,050.92 × 12,549.66
  4. Step 4: Simplify right side
    21,051.92x = 364,579,168.69
  5. Step 5: Solve for x
    x = 364,579,168.69/21,051.92
  6. Step 6: Final answer
    x = 17,318.10

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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.