Home / 21,476.31-29,635.80-12,402.05

Finding the Fourth Proportional to 21,476.31, 29,635.80 and 12,402.05

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Solution

The fourth proportional to 21,476.31, 29,635.80 and 12,402.05 is: 17,113.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,476.31 : 29,635.80 = 12,402.05 : x
  2. Step 2: Convert to fraction form
    21,476.31/29,635.80 = 12,402.05/x
  3. Step 3: Cross multiply
    21,476.31x = 29,635.80 × 12,402.05
  4. Step 4: Simplify right side
    21,476.31x = 367,544,525.21
  5. Step 5: Solve for x
    x = 367,544,525.21/21,476.31
  6. Step 6: Final answer
    x = 17,113.95

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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.