Home / 21,238.12-31,839.36-9,389.98

Finding the Fourth Proportional to 21,238.12, 31,839.36 and 9,389.98

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Solution

The fourth proportional to 21,238.12, 31,839.36 and 9,389.98 is: 14,077.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,238.12 : 31,839.36 = 9,389.98 : x
  2. Step 2: Convert to fraction form
    21,238.12/31,839.36 = 9,389.98/x
  3. Step 3: Cross multiply
    21,238.12x = 31,839.36 × 9,389.98
  4. Step 4: Simplify right side
    21,238.12x = 298,970,953.61
  5. Step 5: Solve for x
    x = 298,970,953.61/21,238.12
  6. Step 6: Final answer
    x = 14,077.09

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Why These Related Problems?

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