Home / 21,382.78-29,507.60-11,951.32

Finding the Fourth Proportional to 21,382.78, 29,507.60 and 11,951.32

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Solution

The fourth proportional to 21,382.78, 29,507.60 and 11,951.32 is: 16,492.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,382.78 : 29,507.60 = 11,951.32 : x
  2. Step 2: Convert to fraction form
    21,382.78/29,507.60 = 11,951.32/x
  3. Step 3: Cross multiply
    21,382.78x = 29,507.60 × 11,951.32
  4. Step 4: Simplify right side
    21,382.78x = 352,654,562.74
  5. Step 5: Solve for x
    x = 352,654,562.74/21,382.78
  6. Step 6: Final answer
    x = 16,492.46

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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.