Home / 21,004.84-31,507.26-5,421.25

Finding the Fourth Proportional to 21,004.84, 31,507.26 and 5,421.25

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Solution

The fourth proportional to 21,004.84, 31,507.26 and 5,421.25 is: 8,131.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,004.84 : 31,507.26 = 5,421.25 : x
  2. Step 2: Convert to fraction form
    21,004.84/31,507.26 = 5,421.25/x
  3. Step 3: Cross multiply
    21,004.84x = 31,507.26 × 5,421.25
  4. Step 4: Simplify right side
    21,004.84x = 170,808,733.28
  5. Step 5: Solve for x
    x = 170,808,733.28/21,004.84
  6. Step 6: Final answer
    x = 8,131.88

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.