Home / 21,721.56-29,985.96-16,345.99

Finding the Fourth Proportional to 21,721.56, 29,985.96 and 16,345.99

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Solution

The fourth proportional to 21,721.56, 29,985.96 and 16,345.99 is: 22,565.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,721.56 : 29,985.96 = 16,345.99 : x
  2. Step 2: Convert to fraction form
    21,721.56/29,985.96 = 16,345.99/x
  3. Step 3: Cross multiply
    21,721.56x = 29,985.96 × 16,345.99
  4. Step 4: Simplify right side
    21,721.56x = 490,150,202.30
  5. Step 5: Solve for x
    x = 490,150,202.30/21,721.56
  6. Step 6: Final answer
    x = 22,565.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.