Home / 28,965.60-39,990.96-19,905.84

Finding the Fourth Proportional to 28,965.60, 39,990.96 and 19,905.84

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Solution

The fourth proportional to 28,965.60, 39,990.96 and 19,905.84 is: 27,482.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,965.60 : 39,990.96 = 19,905.84 : x
  2. Step 2: Convert to fraction form
    28,965.60/39,990.96 = 19,905.84/x
  3. Step 3: Cross multiply
    28,965.60x = 39,990.96 × 19,905.84
  4. Step 4: Simplify right side
    28,965.60x = 796,053,651.21
  5. Step 5: Solve for x
    x = 796,053,651.21/28,965.60
  6. Step 6: Final answer
    x = 27,482.73

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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.