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Finding the Fourth Proportional to 30,997.84, 42,775.50 and 16,850.20

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Solution

The fourth proportional to 30,997.84, 42,775.50 and 16,850.20 is: 23,252.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,997.84 : 42,775.50 = 16,850.20 : x
  2. Step 2: Convert to fraction form
    30,997.84/42,775.50 = 16,850.20/x
  3. Step 3: Cross multiply
    30,997.84x = 42,775.50 × 16,850.20
  4. Step 4: Simplify right side
    30,997.84x = 720,775,730.10
  5. Step 5: Solve for x
    x = 720,775,730.10/30,997.84
  6. Step 6: Final answer
    x = 23,252.45

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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.