Home / 30,439.50-41,928.44-21,471.28

Finding the Fourth Proportional to 30,439.50, 41,928.44 and 21,471.28

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Solution

The fourth proportional to 30,439.50, 41,928.44 and 21,471.28 is: 29,575.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,439.50 : 41,928.44 = 21,471.28 : x
  2. Step 2: Convert to fraction form
    30,439.50/41,928.44 = 21,471.28/x
  3. Step 3: Cross multiply
    30,439.50x = 41,928.44 × 21,471.28
  4. Step 4: Simplify right side
    30,439.50x = 900,257,063.03
  5. Step 5: Solve for x
    x = 900,257,063.03/30,439.50
  6. Step 6: Final answer
    x = 29,575.29

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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.