Home / 21,429.92-29,572.72-11,999.52

Finding the Fourth Proportional to 21,429.92, 29,572.72 and 11,999.52

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Solution

The fourth proportional to 21,429.92, 29,572.72 and 11,999.52 is: 16,559.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,429.92 : 29,572.72 = 11,999.52 : x
  2. Step 2: Convert to fraction form
    21,429.92/29,572.72 = 11,999.52/x
  3. Step 3: Cross multiply
    21,429.92x = 29,572.72 × 11,999.52
  4. Step 4: Simplify right side
    21,429.92x = 354,858,445.09
  5. Step 5: Solve for x
    x = 354,858,445.09/21,429.92
  6. Step 6: Final answer
    x = 16,559.02

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1.5x scale

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.