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Finding the Fourth Proportional to 21,804.81, 30,082.77 and 12,367.91

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Solution

The fourth proportional to 21,804.81, 30,082.77 and 12,367.91 is: 17,063.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,804.81 : 30,082.77 = 12,367.91 : x
  2. Step 2: Convert to fraction form
    21,804.81/30,082.77 = 12,367.91/x
  3. Step 3: Cross multiply
    21,804.81x = 30,082.77 × 12,367.91
  4. Step 4: Simplify right side
    21,804.81x = 372,060,863.12
  5. Step 5: Solve for x
    x = 372,060,863.12/21,804.81
  6. Step 6: Final answer
    x = 17,063.25

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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.