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Finding the Fourth Proportional to 21,699.66, 29,944.32 and 12,267.62

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Solution

The fourth proportional to 21,699.66, 29,944.32 and 12,267.62 is: 16,928.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,699.66 : 29,944.32 = 12,267.62 : x
  2. Step 2: Convert to fraction form
    21,699.66/29,944.32 = 12,267.62/x
  3. Step 3: Cross multiply
    21,699.66x = 29,944.32 × 12,267.62
  4. Step 4: Simplify right side
    21,699.66x = 367,345,538.92
  5. Step 5: Solve for x
    x = 367,345,538.92/21,699.66
  6. Step 6: Final answer
    x = 16,928.63

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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.