Home / 21,421.25-29,557.13-13,458.88

Finding the Fourth Proportional to 21,421.25, 29,557.13 and 13,458.88

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Solution

The fourth proportional to 21,421.25, 29,557.13 and 13,458.88 is: 18,570.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,421.25 : 29,557.13 = 13,458.88 : x
  2. Step 2: Convert to fraction form
    21,421.25/29,557.13 = 13,458.88/x
  3. Step 3: Cross multiply
    21,421.25x = 29,557.13 × 13,458.88
  4. Step 4: Simplify right side
    21,421.25x = 397,805,724.63
  5. Step 5: Solve for x
    x = 397,805,724.63/21,421.25
  6. Step 6: Final answer
    x = 18,570.61

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.