Home / 21,018.60-29,004.79-11,458.28

Finding the Fourth Proportional to 21,018.60, 29,004.79 and 11,458.28

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Solution

The fourth proportional to 21,018.60, 29,004.79 and 11,458.28 is: 15,811.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,018.60 : 29,004.79 = 11,458.28 : x
  2. Step 2: Convert to fraction form
    21,018.60/29,004.79 = 11,458.28/x
  3. Step 3: Cross multiply
    21,018.60x = 29,004.79 × 11,458.28
  4. Step 4: Simplify right side
    21,018.60x = 332,344,947.87
  5. Step 5: Solve for x
    x = 332,344,947.87/21,018.60
  6. Step 6: Final answer
    x = 15,811.95

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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.