Home / 21,178.26-29,227.77-11,748.78

Finding the Fourth Proportional to 21,178.26, 29,227.77 and 11,748.78

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Solution

The fourth proportional to 21,178.26, 29,227.77 and 11,748.78 is: 16,214.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,178.26 : 29,227.77 = 11,748.78 : x
  2. Step 2: Convert to fraction form
    21,178.26/29,227.77 = 11,748.78/x
  3. Step 3: Cross multiply
    21,178.26x = 29,227.77 × 11,748.78
  4. Step 4: Simplify right side
    21,178.26x = 343,390,639.62
  5. Step 5: Solve for x
    x = 343,390,639.62/21,178.26
  6. Step 6: Final answer
    x = 16,214.30

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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.