Home / 21,711.39-29,962.35-12,279.75

Finding the Fourth Proportional to 21,711.39, 29,962.35 and 12,279.75

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Solution

The fourth proportional to 21,711.39, 29,962.35 and 12,279.75 is: 16,946.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,711.39 : 29,962.35 = 12,279.75 : x
  2. Step 2: Convert to fraction form
    21,711.39/29,962.35 = 12,279.75/x
  3. Step 3: Cross multiply
    21,711.39x = 29,962.35 × 12,279.75
  4. Step 4: Simplify right side
    21,711.39x = 367,930,167.41
  5. Step 5: Solve for x
    x = 367,930,167.41/21,711.39
  6. Step 6: Final answer
    x = 16,946.41

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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.