Home / 21,942.31-30,284-13,449.15

Finding the Fourth Proportional to 21,942.31, 30,284 and 13,449.15

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Solution

The fourth proportional to 21,942.31, 30,284 and 13,449.15 is: 18,562.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,942.31 : 30,284 = 13,449.15 : x
  2. Step 2: Convert to fraction form
    21,942.31/30,284 = 13,449.15/x
  3. Step 3: Cross multiply
    21,942.31x = 30,284 × 13,449.15
  4. Step 4: Simplify right side
    21,942.31x = 407,294,058.60
  5. Step 5: Solve for x
    x = 407,294,058.60/21,942.31
  6. Step 6: Final answer
    x = 18,562.05

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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.