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Finding the Fourth Proportional to 28,382.16, 42,599.16 and 21,786.96

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Solution

The fourth proportional to 28,382.16, 42,599.16 and 21,786.96 is: 32,700.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,382.16 : 42,599.16 = 21,786.96 : x
  2. Step 2: Convert to fraction form
    28,382.16/42,599.16 = 21,786.96/x
  3. Step 3: Cross multiply
    28,382.16x = 42,599.16 × 21,786.96
  4. Step 4: Simplify right side
    28,382.16x = 928,106,194.95
  5. Step 5: Solve for x
    x = 928,106,194.95/28,382.16
  6. Step 6: Final answer
    x = 32,700.34

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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.