Home / 21,085.91-31,648-11,233.47

Finding the Fourth Proportional to 21,085.91, 31,648 and 11,233.47

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Solution

The fourth proportional to 21,085.91, 31,648 and 11,233.47 is: 16,860.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,085.91 : 31,648 = 11,233.47 : x
  2. Step 2: Convert to fraction form
    21,085.91/31,648 = 11,233.47/x
  3. Step 3: Cross multiply
    21,085.91x = 31,648 × 11,233.47
  4. Step 4: Simplify right side
    21,085.91x = 355,516,858.56
  5. Step 5: Solve for x
    x = 355,516,858.56/21,085.91
  6. Step 6: Final answer
    x = 16,860.40

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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.