Home / 30,997.32-42,776.55-16,850.13

Finding the Fourth Proportional to 30,997.32, 42,776.55 and 16,850.13

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Solution

The fourth proportional to 30,997.32, 42,776.55 and 16,850.13 is: 23,253.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,997.32 : 42,776.55 = 16,850.13 : x
  2. Step 2: Convert to fraction form
    30,997.32/42,776.55 = 16,850.13/x
  3. Step 3: Cross multiply
    30,997.32x = 42,776.55 × 16,850.13
  4. Step 4: Simplify right side
    30,997.32x = 720,790,428.45
  5. Step 5: Solve for x
    x = 720,790,428.45/30,997.32
  6. Step 6: Final answer
    x = 23,253.31

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Double scale
Find fourth proportional to 30,998.32, 42,777.93 and 16,851.13
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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.