Home / 21,380.13-29,501.69-11,947.41

Finding the Fourth Proportional to 21,380.13, 29,501.69 and 11,947.41

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Solution

The fourth proportional to 21,380.13, 29,501.69 and 11,947.41 is: 16,485.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,380.13 : 29,501.69 = 11,947.41 : x
  2. Step 2: Convert to fraction form
    21,380.13/29,501.69 = 11,947.41/x
  3. Step 3: Cross multiply
    21,380.13x = 29,501.69 × 11,947.41
  4. Step 4: Simplify right side
    21,380.13x = 352,468,726.39
  5. Step 5: Solve for x
    x = 352,468,726.39/21,380.13
  6. Step 6: Final answer
    x = 16,485.81

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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.