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Finding the Fourth Proportional to 21,693.28, 29,936.64 and 12,133.18

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Solution

The fourth proportional to 21,693.28, 29,936.64 and 12,133.18 is: 16,743.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,693.28 : 29,936.64 = 12,133.18 : x
  2. Step 2: Convert to fraction form
    21,693.28/29,936.64 = 12,133.18/x
  3. Step 3: Cross multiply
    21,693.28x = 29,936.64 × 12,133.18
  4. Step 4: Simplify right side
    21,693.28x = 363,226,641.72
  5. Step 5: Solve for x
    x = 363,226,641.72/21,693.28
  6. Step 6: Final answer
    x = 16,743.74

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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.