Home / 21,285.18-31,891.32-11,395.08

Finding the Fourth Proportional to 21,285.18, 31,891.32 and 11,395.08

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Solution

The fourth proportional to 21,285.18, 31,891.32 and 11,395.08 is: 17,073.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,285.18 : 31,891.32 = 11,395.08 : x
  2. Step 2: Convert to fraction form
    21,285.18/31,891.32 = 11,395.08/x
  3. Step 3: Cross multiply
    21,285.18x = 31,891.32 × 11,395.08
  4. Step 4: Simplify right side
    21,285.18x = 363,404,142.71
  5. Step 5: Solve for x
    x = 363,404,142.71/21,285.18
  6. Step 6: Final answer
    x = 17,073.11

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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.