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Finding the Fourth Proportional to 30,873.92, 42,607.98 and 18,935.63

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Solution

The fourth proportional to 30,873.92, 42,607.98 and 18,935.63 is: 26,132.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,873.92 : 42,607.98 = 18,935.63 : x
  2. Step 2: Convert to fraction form
    30,873.92/42,607.98 = 18,935.63/x
  3. Step 3: Cross multiply
    30,873.92x = 42,607.98 × 18,935.63
  4. Step 4: Simplify right side
    30,873.92x = 806,808,944.33
  5. Step 5: Solve for x
    x = 806,808,944.33/30,873.92
  6. Step 6: Final answer
    x = 26,132.38

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Double scale
Find fourth proportional to 30,874.92, 42,609.36 and 18,936.63
Similar ratio
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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.