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Finding the Fourth Proportional to 30,873, 42,594.84 and 18,930.36

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Solution

The fourth proportional to 30,873, 42,594.84 and 18,930.36 is: 26,117.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,873 : 42,594.84 = 18,930.36 : x
  2. Step 2: Convert to fraction form
    30,873/42,594.84 = 18,930.36/x
  3. Step 3: Cross multiply
    30,873x = 42,594.84 × 18,930.36
  4. Step 4: Simplify right side
    30,873x = 806,335,655.34
  5. Step 5: Solve for x
    x = 806,335,655.34/30,873
  6. Step 6: Final answer
    x = 26,117.83

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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.