Home / 21,290.84-29,379.94-12,336.74

Finding the Fourth Proportional to 21,290.84, 29,379.94 and 12,336.74

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Solution

The fourth proportional to 21,290.84, 29,379.94 and 12,336.74 is: 17,023.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,290.84 : 29,379.94 = 12,336.74 : x
  2. Step 2: Convert to fraction form
    21,290.84/29,379.94 = 12,336.74/x
  3. Step 3: Cross multiply
    21,290.84x = 29,379.94 × 12,336.74
  4. Step 4: Simplify right side
    21,290.84x = 362,452,613.43
  5. Step 5: Solve for x
    x = 362,452,613.43/21,290.84
  6. Step 6: Final answer
    x = 17,023.88

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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.