Home / 15,719.31-21,694.77-14,390.64

Finding the Fourth Proportional to 15,719.31, 21,694.77 and 14,390.64

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Solution

The fourth proportional to 15,719.31, 21,694.77 and 14,390.64 is: 19,861.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,719.31 : 21,694.77 = 14,390.64 : x
  2. Step 2: Convert to fraction form
    15,719.31/21,694.77 = 14,390.64/x
  3. Step 3: Cross multiply
    15,719.31x = 21,694.77 × 14,390.64
  4. Step 4: Simplify right side
    15,719.31x = 312,201,624.95
  5. Step 5: Solve for x
    x = 312,201,624.95/15,719.31
  6. Step 6: Final answer
    x = 19,861.03

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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.