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Finding the Fourth Proportional to 30,577.92, 45,867.87 and 8,391.21

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Solution

The fourth proportional to 30,577.92, 45,867.87 and 8,391.21 is: 12,587.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,577.92 : 45,867.87 = 8,391.21 : x
  2. Step 2: Convert to fraction form
    30,577.92/45,867.87 = 8,391.21/x
  3. Step 3: Cross multiply
    30,577.92x = 45,867.87 × 8,391.21
  4. Step 4: Simplify right side
    30,577.92x = 384,886,929.42
  5. Step 5: Solve for x
    x = 384,886,929.42/30,577.92
  6. Step 6: Final answer
    x = 12,587.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.