Home / 21,415.78-29,551.80-11,982.52

Finding the Fourth Proportional to 21,415.78, 29,551.80 and 11,982.52

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Solution

The fourth proportional to 21,415.78, 29,551.80 and 11,982.52 is: 16,534.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,415.78 : 29,551.80 = 11,982.52 : x
  2. Step 2: Convert to fraction form
    21,415.78/29,551.80 = 11,982.52/x
  3. Step 3: Cross multiply
    21,415.78x = 29,551.80 × 11,982.52
  4. Step 4: Simplify right side
    21,415.78x = 354,105,034.54
  5. Step 5: Solve for x
    x = 354,105,034.54/21,415.78
  6. Step 6: Final answer
    x = 16,534.77

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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.