Home / 28,577.80-42,776.96-19,640.88

Finding the Fourth Proportional to 28,577.80, 42,776.96 and 19,640.88

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Solution

The fourth proportional to 28,577.80, 42,776.96 and 19,640.88 is: 29,399.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,577.80 : 42,776.96 = 19,640.88 : x
  2. Step 2: Convert to fraction form
    28,577.80/42,776.96 = 19,640.88/x
  3. Step 3: Cross multiply
    28,577.80x = 42,776.96 × 19,640.88
  4. Step 4: Simplify right side
    28,577.80x = 840,177,138.12
  5. Step 5: Solve for x
    x = 840,177,138.12/28,577.80
  6. Step 6: Final answer
    x = 29,399.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.