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Finding the Fourth Proportional to 28,230.84, 38,936.52 and 19,730.16

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Solution

The fourth proportional to 28,230.84, 38,936.52 and 19,730.16 is: 27,212.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,230.84 : 38,936.52 = 19,730.16 : x
  2. Step 2: Convert to fraction form
    28,230.84/38,936.52 = 19,730.16/x
  3. Step 3: Cross multiply
    28,230.84x = 38,936.52 × 19,730.16
  4. Step 4: Simplify right side
    28,230.84x = 768,223,769.44
  5. Step 5: Solve for x
    x = 768,223,769.44/28,230.84
  6. Step 6: Final answer
    x = 27,212.22

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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.