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Finding the Fourth Proportional to 21,698.40, 29,943.84 and 12,266.97

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Solution

The fourth proportional to 21,698.40, 29,943.84 and 12,266.97 is: 16,928.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,698.40 : 29,943.84 = 12,266.97 : x
  2. Step 2: Convert to fraction form
    21,698.40/29,943.84 = 12,266.97/x
  3. Step 3: Cross multiply
    21,698.40x = 29,943.84 × 12,266.97
  4. Step 4: Simplify right side
    21,698.40x = 367,320,186.96
  5. Step 5: Solve for x
    x = 367,320,186.96/21,698.40
  6. Step 6: Final answer
    x = 16,928.45

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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.