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Finding the Fourth Proportional to 21,594.49, 29,800.79 and 12,163.39

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Solution

The fourth proportional to 21,594.49, 29,800.79 and 12,163.39 is: 16,785.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,594.49 : 29,800.79 = 12,163.39 : x
  2. Step 2: Convert to fraction form
    21,594.49/29,800.79 = 12,163.39/x
  3. Step 3: Cross multiply
    21,594.49x = 29,800.79 × 12,163.39
  4. Step 4: Simplify right side
    21,594.49x = 362,478,631.08
  5. Step 5: Solve for x
    x = 362,478,631.08/21,594.49
  6. Step 6: Final answer
    x = 16,785.70

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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.