Home / 21,129.93-29,159.73-11,698.83

Finding the Fourth Proportional to 21,129.93, 29,159.73 and 11,698.83

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Solution

The fourth proportional to 21,129.93, 29,159.73 and 11,698.83 is: 16,144.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,129.93 : 29,159.73 = 11,698.83 : x
  2. Step 2: Convert to fraction form
    21,129.93/29,159.73 = 11,698.83/x
  3. Step 3: Cross multiply
    21,129.93x = 29,159.73 × 11,698.83
  4. Step 4: Simplify right side
    21,129.93x = 341,134,724.12
  5. Step 5: Solve for x
    x = 341,134,724.12/21,129.93
  6. Step 6: Final answer
    x = 16,144.62

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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.