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Finding the Fourth Proportional to 25,960.80, 35,803.84 and 21,947.20

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Solution

The fourth proportional to 25,960.80, 35,803.84 and 21,947.20 is: 30,268.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,960.80 : 35,803.84 = 21,947.20 : x
  2. Step 2: Convert to fraction form
    25,960.80/35,803.84 = 21,947.20/x
  3. Step 3: Cross multiply
    25,960.80x = 35,803.84 × 21,947.20
  4. Step 4: Simplify right side
    25,960.80x = 785,794,037.25
  5. Step 5: Solve for x
    x = 785,794,037.25/25,960.80
  6. Step 6: Final answer
    x = 30,268.48

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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.