Home / 21,177.54-29,230.74-13,215.06

Finding the Fourth Proportional to 21,177.54, 29,230.74 and 13,215.06

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Solution

The fourth proportional to 21,177.54, 29,230.74 and 13,215.06 is: 18,240.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,177.54 : 29,230.74 = 13,215.06 : x
  2. Step 2: Convert to fraction form
    21,177.54/29,230.74 = 13,215.06/x
  3. Step 3: Cross multiply
    21,177.54x = 29,230.74 × 13,215.06
  4. Step 4: Simplify right side
    21,177.54x = 386,285,982.94
  5. Step 5: Solve for x
    x = 386,285,982.94/21,177.54
  6. Step 6: Final answer
    x = 18,240.36

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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.