Home / 21,225.38-31,652.78-18,605.03

Finding the Fourth Proportional to 21,225.38, 31,652.78 and 18,605.03

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Solution

The fourth proportional to 21,225.38, 31,652.78 and 18,605.03 is: 27,745.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,225.38 : 31,652.78 = 18,605.03 : x
  2. Step 2: Convert to fraction form
    21,225.38/31,652.78 = 18,605.03/x
  3. Step 3: Cross multiply
    21,225.38x = 31,652.78 × 18,605.03
  4. Step 4: Simplify right side
    21,225.38x = 588,900,670.19
  5. Step 5: Solve for x
    x = 588,900,670.19/21,225.38
  6. Step 6: Final answer
    x = 27,745.12

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.