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Finding the Fourth Proportional to 21,991.66, 30,350.10 and 12,560.02

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Solution

The fourth proportional to 21,991.66, 30,350.10 and 12,560.02 is: 17,333.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,991.66 : 30,350.10 = 12,560.02 : x
  2. Step 2: Convert to fraction form
    21,991.66/30,350.10 = 12,560.02/x
  3. Step 3: Cross multiply
    21,991.66x = 30,350.10 × 12,560.02
  4. Step 4: Simplify right side
    21,991.66x = 381,197,863.00
  5. Step 5: Solve for x
    x = 381,197,863.00/21,991.66
  6. Step 6: Final answer
    x = 17,333.75

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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.