Home / 21,451.95-29,602.20-11,891.16

Finding the Fourth Proportional to 21,451.95, 29,602.20 and 11,891.16

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Solution

The fourth proportional to 21,451.95, 29,602.20 and 11,891.16 is: 16,408.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,451.95 : 29,602.20 = 11,891.16 : x
  2. Step 2: Convert to fraction form
    21,451.95/29,602.20 = 11,891.16/x
  3. Step 3: Cross multiply
    21,451.95x = 29,602.20 × 11,891.16
  4. Step 4: Simplify right side
    21,451.95x = 352,004,496.55
  5. Step 5: Solve for x
    x = 352,004,496.55/21,451.95
  6. Step 6: Final answer
    x = 16,408.97

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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.