Home / 21,178.54-29,232.12-13,216.06

Finding the Fourth Proportional to 21,178.54, 29,232.12 and 13,216.06

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Solution

The fourth proportional to 21,178.54, 29,232.12 and 13,216.06 is: 18,241.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,178.54 : 29,232.12 = 13,216.06 : x
  2. Step 2: Convert to fraction form
    21,178.54/29,232.12 = 13,216.06/x
  3. Step 3: Cross multiply
    21,178.54x = 29,232.12 × 13,216.06
  4. Step 4: Simplify right side
    21,178.54x = 386,333,451.85
  5. Step 5: Solve for x
    x = 386,333,451.85/21,178.54
  6. Step 6: Final answer
    x = 18,241.74

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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.